Document:

Exhibiti 4.1

 Exhibit 4.1 
 AMENDMENT NO. 1 TO RIGHTS AGREEMENT 
 This Amendment No. 1 to
Rights Agreement (this “Amendment”), dated as of October 2, 2012, by and between COMPUTER SOFTWARE INNOVATIONS, INC., a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust
Company (the “Rights Agent”) amends that certain Rights Agreement, dated as of March 5, 2012 (the “Rights Agreement”). 
 The Company and the Rights Agent have heretofore executed and entered into the Rights Agreement. Pursuant to Section 28 of the Rights Agreement, the Company and the Rights Agent may from time to time
supplement or amend the Rights Agreement in accordance with the provisions of Section 28 thereof and the Company desires and directs the Rights Agent to so amend the Rights Agreement. All acts and things necessary to make this Amendment a valid
agreement according to its terms have been done and performed, and the execution and delivery of this Amendment by the Company and the Rights Agent have been in all respects authorized by the Company and the Rights Agent. 

In consideration of the foregoing premises and mutual agreements set forth in the Rights Agreement and this Amendment, the parties hereto
agree as follows: 
 1. Section 1 of the Rights Agreement is hereby amended by adding as the final sentence to the
definition of “Acquiring Person” the following: 
 “Notwithstanding the foregoing, N. HARRIS COMPUTER CORPORATION,
a company organized under the Business Corporations Act (Ontario) (“Parent”), or any Affiliate or Associate thereof, including NHCC MERGER CORP., a Delaware corporation and wholly owned subsidiary of Parent (“Merger
Sub”) and CONSTELLATION SOFTWARE INC., a company organized under the Business Corporations Act (Ontario) and the parent of Parent (the “Guarantor”), shall not become an “Acquiring Person” as a result of
(i) the approval, execution or delivery of that certain Agreement and Plan of Merger dated as of October 2, 2012 (as the same may be amended from time to time, the “Merger Agreement”), by and among the Company, Parent,
Merger Sub and, solely for the purposes of Section 9.14 thereof, the Guarantor, including the approval, execution and delivery of any amendments thereto, (ii) the announcement, commencement and consummation of the Offer (as such term is
defined in the Merger Agreement), (iii) the consummation of the Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for payment and purchase or exchange of Common Shares or Series A Preferred Stock pursuant to the
Merger Agreement, including, without limitation, in connection with the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in the Merger Agreement), (v) the announcement of the Merger Agreement or the Merger (as
such term is defined in the Merger Agreement) or (vi) the consummation of any other transaction pursuant to the Merger Agreement.” 
 2. Section 1 of the Rights Agreement is further amended by adding as the final sentence to the definition of “Stock Acquisition Date” the following: 

“Notwithstanding anything in this Rights Agreement to the contrary, no Stock Acquisition Date shall be deemed to have occurred solely
as a result of (i) the approval, execution or 

 
delivery of the Merger Agreement, including the approval, execution and delivery of any amendments thereto, (ii) the announcement, commencement and consummation of the Offer (as such term is
defined in the Merger Agreement), (iii) the consummation of the Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for payment and purchase or exchange of Common Shares or Series A Preferred Stock pursuant to the
Merger Agreement, including, without limitation, in connection with the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in the Merger Agreement), (v) the announcement of the Merger Agreement or the Merger (as
such term is defined in the Merger Agreement) or (vi) the consummation of any other transaction pursuant to the Merger Agreement.” 
 3. Section 3(a) of the Rights Agreement is further amended by adding as the final sentence thereto the following: 
 “Notwithstanding anything in this Rights Agreement to the contrary, no Distribution Date shall be deemed to have occurred solely as a result of (i) the approval, execution or delivery of the
Merger Agreement, including the approval, execution and delivery of any amendments thereto, (ii) the announcement, commencement and consummation of the Offer (as such term is defined in the Merger Agreement), (iii) the consummation of the
Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for payment and purchase or exchange of Common Shares or Series A Preferred Stock pursuant to the Merger Agreement, including, without limitation, in connection with
the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in the Merger Agreement), (v) the announcement of the Merger Agreement or the Merger (as such term is defined in the Merger Agreement) or (vi) the
consummation of any other transaction pursuant to the Merger Agreement.” 
 4. Section 7(a) of the Rights Agreement is
further amended by adding as the final sentence thereto the following: 
 “Notwithstanding anything in this Rights Agreement
to the contrary, no Distribution Date shall be deemed to have occurred solely as a result of (i) the approval, execution or delivery of the Merger Agreement, including the approval, execution and delivery of any amendments thereto,
(ii) the announcement, commencement and consummation of the Offer (as such term is defined in the Merger Agreement), (iii) the consummation of the Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for
payment and purchase or exchange of Common Shares or Series A Preferred Stock pursuant to the Merger Agreement, including, without limitation, in connection with the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in
the Merger Agreement), (v) the announcement of the Merger Agreement or the Merger (as such term is defined in the Merger Agreement) or (vi) the consummation of any other transaction pursuant to the Merger Agreement.” 

5. Section 11(a)(ii) of the Rights Agreement is hereby amended by adding as the final sentence thereto the following: 

“Notwithstanding the foregoing, none of Parent, Merger Sub or Guarantor shall become an Acquiring Person as a result of (i) the
approval, execution or delivery of the Merger Agreement, including the approval, execution and delivery of any amendments thereto, (ii) the announcement, commencement and consummation of the Offer (as such term is

 
defined in the Merger Agreement), (iii) the consummation of the Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for payment and purchase or exchange of
Common Shares or Series A Preferred Stock pursuant to the Merger Agreement, including, without limitation, in connection with the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in the Merger Agreement), (v) the
announcement of the Merger Agreement or the Merger (as such term is defined in the Merger Agreement) or (vi) the consummation of any other transaction pursuant to the Merger Agreement.” 

6. Section 13 of the Rights Agreement is hereby amended by adding as the final sentence thereto the following: 

“Notwithstanding anything in this Rights Agreement to the contrary, no transaction described in clauses (a), (b) or (c) of
this Section 13 shall be deemed to have occurred solely as a result of (i) the approval, execution or delivery of the Merger Agreement, including the approval, execution and delivery of any amendments thereto, (ii) the announcement,
commencement and consummation of the Offer (as such term is defined in the Merger Agreement), (iii) the consummation of the Merger (as such term is defined in the Merger Agreement), (iv) the acceptance for payment and purchase or exchange
of Common Shares or Series A Preferred Stock pursuant to the Merger Agreement, including, without limitation, in connection with the Offer, the Merger or the exercise of the Top-Up Option (as such term is defined in the Merger Agreement),
(v) the announcement of the Merger Agreement or the Merger (as such term is defined in the Merger Agreement) or (vi) the consummation of any other transaction pursuant to the Merger Agreement.” 

7. A new Section 37 shall be added and shall read as follows: 

“Section 37. Termination. Immediately prior to the Effective Time (as such term is defined in the Merger Agreement), this
Rights Agreement shall be terminated and all outstanding Rights shall expire. The Company will notify the Rights Agent promptly after the occurrence of the Effective Time of the termination of this Rights Agreement.” 

8. Except as expressly amended hereby, the Rights Agreement remains in full force and effect in accordance with its terms. 

9. This Amendment shall be governed by and construed in accordance with the laws of the State of Delaware. 

10. This Amendment may be executed in any number of counterparts and each of such counterparts shall for all purposes be deemed an
original, and all such counterparts shall together constitute but one and the same instrument. A signature to this Amendment transmitted electronically shall have the same authority, effect, and enforceability as an original signature. 

11. Except as expressly set forth herein, this Amendment shall not by implication or otherwise alter, modify, amend or in any way affect
any of the terms, conditions, obligations, covenants or agreements contained in the Rights Agreement, all of which are ratified and affirmed in all respects and shall continue in full force and effect. 

12. Capitalized terms used herein but not defined shall have the meanings given to them in the Rights Agreement. 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of
the day and year first above written. 
  

			
	 COMPUTER SOFTWARE

INNOVATIONS, INC.

		
	By:	 	/s/ Nancy K. Hedrick
		 	Name: Nancy K. Hedrick
		 	Title:   President and Chief Executive Officer
	
	CONTINENTAL STOCK TRANSFER & TRUST COMPANY
		
	By:	 	/s/ Leslie De Luca
		 	Name: Leslie De Luca
		 	Title:   Vice PresidentExhibit 10.1

 Exhibit 10.1 
 September 28, 2012 
 Computer Software Innovations, Inc. 

1661 East Main Street, Suite A 
 Easley, South
Carolina 29642 
 Attention: David Dechant, Chief Financial Officer 

 

	 	Re:	Credit Agreement, dated as of March 6, 2012, between Computer Software 

 Innovations, Inc. (the “Borrower”) and Fifth Third Bank (the “Lender”) 
 (as amended from time to time, the “Credit Agreement”) 
 Dear Mr. Dechant:

 Reference is made to the Credit Agreement, pursuant to which the Lender extended to the Borrower a revolving credit facility
and a term loan in the amounts set forth in the Credit Agreement. Capitalized terms used herein and not otherwise defined shall have the meanings assigned to them in the Credit Agreement. 

The Borrower has informed the Lender that it has entered into or will enter into an Agreement and Plan of Merger (the “Merger
Agreement”) with N. Harris Computer Corporation, a corporation organized under the Business Corporations Act (Ontario) (“Parent”), NHCC Merger Corp., a Delaware corporation and subsidiary of Parent (“Merger Sub”), and solely
for the purposes of Section 9.14 thereof, Constellation Software Inc., a company organized under the Business Corporations Act (Ontario) (the “Guarantor”), providing, among other things, for (i) the commencement of a tender offer
by Merger Sub to purchase all the outstanding shares of common stock and preferred stock of the Borrower, and (ii) the merger of Merger Sub with and into the Borrower whereby the Borrower would become a wholly-owned subsidiary of Parent
(collectively, the “Merger Transaction”). 
 Pursuant to Section 7.1(n) of the Credit Agreement, the Borrower
agreed that an Event of Default would occur thereunder if a Change of Control occurred. The entering into of the Merger Agreement and the consummation of the Merger Transaction contemplated thereby by the Borrower will result in a Change of Control
under the Credit Agreement. The Borrower has, however, requested that the Lender consent to the Merger Transaction. Please be advised that the Lender hereby consents to the Merger Transaction; provided, that (i) no other Default or Event
of Default exists under the Loan Documents; (ii) if the Merger Transaction is consummated, it is consummated in accordance with the provisions of the Merger Agreement and related agreements, instruments and documents; (iii) the Borrower
shall promptly provide the Lender (A) fully-executed copies of the Merger Agreement and all schedules and exhibits with respect thereto, (B) any and all other material agreements, instruments or documents relating to the Merger Transaction
and (C) any and all other documentation and related information reasonably requested by the Lender with respect to the Merger Transaction; (iv) concurrently with the consummation of the Merger Transaction, all Obligations owed by the
Borrower to the Lender will be repaid and all commitments of the Lender under the Credit Agreement shall be cancelled and terminated; and (v) upon 

 Computer Software Innovations, Inc. 
 September 28, 2012 
 Page 2 
 execution of this letter, the Borrower shall the Lender pay a consent fee in the amount of $10,000.00 and shall reimburse the Lender for all fees and expenses incurred by the Lender in connection with
this matters contemplated hereby (including attorneys’ fees). 
 The consents contained herein shall be limited to the
specific consents made herein. Except as set forth herein, the Lender hereby expressly reserves all rights, remedies, powers and privileges it has or may have under any of the Loan Documents, any agreement, document, instrument or applicable law or
equity with respect to any Default or Event of Default that may arise as a result of the Merger Transaction. 
 This letter
constitutes an accommodation to the Borrower and the agreements contained herein shall be limited to the specific agreements made herein. Except as otherwise modified herein, all other terms and conditions of the Credit Agreement and the other Loan
Documents continue in full force and effect and are unmodified by this letter. 
 [INTENTIONALLY LEFT BLANK] 

 Computer Software Innovations, Inc. 
 September 28, 2012 
 Page 3 

If the foregoing terms and conditions are acceptable to you, please indicate your acceptance by signing in the space indicated on the
following page. This letter agreement shall constitute a rider to and form a part of the Credit Agreement, as the same may be amended, modified or supplemented from time to time. 

 

			
	FIFTH THIRD BANK
		
	By:	 	/s/ Charles H. Arndt
	Name:	 	Charles H. Arndt
	Title:	 	SVP

 Acknowledged and accepted this 
 28 day of September, 2012: 
  

					
	COMPUTER SOFTWARE INNOVATIONS, INC.
			
	By:	 	/s/ David Dechant	 	(SEAL)
	Name:	 	David Dechant	 	
	Title:	 	CFO

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