<PAGE>

                                                                    EXHIBIT 10.1

                                MASTER AMENDMENT

                                to those certain

                          APRIL 1, 2005 LOAN DOCUMENTS

                                 by and between

            Stellar Technologies, Inc. and Trident Growth Fund, L.P.


This Master Amendment to that certain Loan Agreement and related Loan Documents
originally entered into by and between Stellar Technologies, Inc., a Colorado
corporation ("BORROWER"), and Trident Growth Fund, L.P., a Delaware limited
partnership ("LENDER"), on April 1, 2005 (this "FIRST AMENDMENT") is made and
entered into effective as of the 1st day of May 2006.

                              W I T N E S S E T H:

WHEREAS, on April 1, 2005, the parties entered into a Loan Agreement and Lender
issued a 12% Secured Convertible Note (the "NOTE") whereby Lender agreed to loan
to Borrower up to $1,600,000 (the "LOAN"), such Loan being secured by Borrower
and secured and guaranteed jointly and severally by CompuSven, Inc., a Florida
corporation, and Stellar Internet Monitoring, LLC, a Georgia limited liability
company, in accordance with those certain Security Agreements and Guarantys
entered into on the same day by such parties. The Loan Agreement, the Note, the
Security Agreements, and the Guarantys are hereinafter collectively referred to
as the "LOAN DOCUMENTS;" and

WHEREAS, Borrower has requested and Lender has agreed to extend the Termination
(Maturity) Date of the Loan from April 30, 2006 to April 30, 2007, subject to
earlier acceleration as stated in the Note and Loan Documents; and

WHEREAS, in accordance with the Loan and certain other transactions between
Borrower and Lender, Lender holds the following warrants to purchase the Common
Stock of Borrower, such warrants collectively hereinafter referred to as the
"TRIDENT WARRANTS":

WARRANT NO.   DATE OF ISSUANCE       SHARES SUBJECT TO WARRANT   EXERCISE PRICE
-----------   ----------------       -------------------------   --------------

2003-3        09/16/03                 125,000                   $0.40
2005-1        04/01/05               1,125,000                   $1.00
2005-2        04/18/05                 100,000                   $0.40
2005-3        11/04/05                 250,000                   $0.40
<PAGE>

WHEREAS, as a result of the anti-dilution provisions set forth in the Trident
Warrants and the recent fundraise by the Borrower as well as Lender's agreement
to extend the Termination Date of the Loan and cancel Warrant No. 2003-3: (i)
the exercise prices of each of the Trident Warrants shall be reduced to $.40 per
share; (ii) the anti-dilution provisions of the Note and Warrants shall be
amended; (iii) the financial covenants and certain of the negative covenants
included in the Note shall be deleted; and (iv) Borrower shall issue to Lender
an additional warrant to purchase up to 1,745,000 shares of Borrower's Common
Stock at an exercise price of $.40 per share.

NOW, THEREFORE, the parties have agreed to amend the Loan and the Loan Documents
as follows:

1. Defined Terms. All capitalized terms set forth but not defined herein shall
have the meaning ascribed to them in the Loan Agreement.

2. Amendments to the Note.

      a) Extension of Termination Date. Lender hereby agrees to extend the
maturity date of the Note, subject to the acceleration provisions set forth
therein, to April 30, 2007 and to amend subsection (ii) of the definition of
Termination Date to evidence that the Note will mature upon the closing of any
equity or convertible debt financing after May 19, 2006 equal to or in excess of
$5,000,000, and accordingly, the Termination Date as defined in the Note and the
Loan Documents generally is hereby amended to state that Borrower agrees and
promises to repay to Lender the entire Loan Amount plus all interest and all
other amounts due under the Note on or before the earlier of: (i) April 30,
2007; (ii) the closing by Borrower of convertible debt or equity financings
after May 19, 2006 whereby the Borrower shall receive gross funding equal to or
greater than $5,000,000; or (iii) the date of any Change of Control of the
Borrower.

      b) Reduction of Conversion Price. The Conversion Price, as set forth in
Section 4(a) of the Note is hereby reduced from $1.00 to $.40, and accordingly,
the Conversion Price, as defined in said Note and the Loan Documents generally,
is hereby amended accordingly.

      c) Modification of Anti-dilution Provisions. Sections 4(a)(i) 4(a)(ii) of
the Note are hereby deleted , the intent of which being the elimination of the
full ratchet anti-dilution for below Conversion Price issuances of securities by
the Borrower, provided the adjustments for stock splits, dividends,
combinations, reverse splits, reclassification, and the like shall remain for
the Note.

3. Amendments to the Trident Warrants.

      a) Modification of Anti-dilution Provisions. Sections IV.1, IV.2 and IV.3
of Trident Warrant No.'s 2005-1 and 2005-3 and Section 6(e) of Trident Warrant
No. 2005-2 are hereby deleted, the intent of which being the elimination of the
full ratchet anti-dilution for below Exercise Price issuances of securities by
the Borrower, provided the adjustments for stock splits, dividends,
combinations, reverse splits, reclassification, and the like shall remain for
each such warrant;

      b) Reduction/Modification of Exercise Price. The Exercise Price set forth
and applicable to each of the Trident Warrants is hereby modified, amended, and
reduced to $.40 per share.

<PAGE>

4. Additional Warrant Coverage. Borrower shall issue an additional Warrant to
Lender in the form of Exhibit A hereto giving Lender the right to purchase an
additional 1,745,000 shares of Common Stock at an exercise price of $.40 per
share. As set forth in the Loan Agreement, Borrower and Lender agree that the
aggregate value of the Warrant to be issued in accordance with this Agreement
together with the Warrants previously issued in connection with the Loan
Agreement is less than $1,000.

5. Amendments to the Loan Agreement.

      a) Extension of Termination Date. Section 1.42 of the Loan Agreement
setting for the definition of Termination Date is hereby amended as set forth in
Section 2(a) of this Master Amendment.

      b) Deletion of Financial Covenants. Section 5.14 of the Loan Agreement is
hereby deleted, the intent of which being the elimination of the financial
covenants contained in the Loan Agreement.

      c) Modification of Covenants. Sections 6.2, 6.5, 6.6, 6.7, 6.8, 6.9, 6.10
and 6.11 of the Loan Agreement are hereby deleted, the intent of which being the
elimination of certain of the negative covenants contained in the Loan
Agreement.

      d) Modification of Registration Rights. Section 9.1 of the Loan Agreement
is hereby deleted in its entirety and replaced with the following:

         "9.1 Registration Rights.

              (a) The Borrower shall notify Lender in writing at least ten (10)
         days prior to the filing of any registration statement under the
         Securities Act for the purpose of registering securities of the
         Borrower, excluding registration statements on SEC Forms S-4, S-8 or
         any similar or successor forms, and upon Lender's request, will include
         the offer and sale of the Registrable Securities in such registration
         statement to the extent permitted by the underwriter, if any. If the
         Lender decides not to include all of the Registrable Securities in any
         registration statement thereafter filed by the Borrower, the Lender
         shall nevertheless continue to have the right to include any
         Registrable Securities in any subsequent registration statement or
         registration statements as may be filed by the Borrower with respect to
         offerings of its securities, all upon the terms and conditions set
         forth herein.

              (b) Whenever required to include Registrable Securities in any
         registration or to effect the registration of any Registrable
         Securities pursuant to this Agreement, the Borrower shall, as
         expeditiously as reasonably possible, prepare and file with the SEC a
         registration statement with respect to such Registrable Securities and
         use its absolute best lawful efforts to cause such registration
         statement to become effective, and use its absolute best efforts to
         keep such registration statement effective until all such Registrable
         Securities have been distributed. In addition, the Borrower shall use
         its best lawful efforts to register and qualify the securities covered
         by such registration statement under such other securities or Blue Sky
         laws of such jurisdictions as shall be reasonably requested by Lender,
         provided that the Borrower shall not be required in connection
         therewith or as a condition thereto to qualify as a broker-dealer in
         any states or jurisdictions or to do business or to file a general
         consent to service of process in any of such states or jurisdictions.
<PAGE>

              (c) All expenses, other than underwriting discounts and
         commissions incurred in connection the registrations contemplated
         herein, including, without limitation, all registration, filing and
         qualification fees, printers' and accounting fees, fees and
         disbursements of counsel for the Borrower, and the reasonable fees and
         disbursements of counsel for the selling Lender, shall be borne by the
         Borrower.

              (d) Subject to the terms and conditions of this Agreement and the
         Convertible Note, the right to cause the Borrower to register
         Registrable Securities pursuant to this Agreement may be assigned by
         Lender to any transferee or assignee of such securities; provided that
         said transferee or assignee is a transferee or assignee of at least
         five percent (5%) of the Registrable Securities."

6. Representations and Warranties. Except as otherwise set forth on Exhibit B
hereto, all of the representations and warranties contained in the Loan
Agreement are true and correct as of the date hereof, and the Disclosure
Schedules attached thereto have not changed in any material manner.

7. General Amendment to Loan Documents; Terms of Loan Agreement Unchanged.
Except as set forth or contemplated herein, the remaining terms of the Loan
Agreement shall remain in effect as set forth therein. Notwithstanding the
foregoing, to the extent necessary, each Loan Document is hereby amended to
reflect the amendments set forth in Sections 2, 3, 4, and 5 above.

8. Execution of Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original as against any
party whose signature appears thereon, and all of which shall together
constitute one and the same instrument.

9. Further Assurances. Each party hereto agrees to perform any further acts and
to execute and deliver any further documents that may be reasonably necessary to
carry out the provisions of this Agreement.

10. Governing Law. This Agreement and the legal relations among the parties
hereto shall be governed by and construed in accordance with the laws of the
State of Texas without regard to its conflicts of law doctrine. Each of the
parties hereto irrevocably consents to the jurisdiction of the federal and state
courts located in Dallas County, the State of Texas.
<PAGE>

      IN WITNESS WHEREOF, the Borrower, Lender, and Guarantors have caused this
Agreement to be duly executed by their duly authorized officers, all as of the
day and year first above written.

    STELLAR TECHNOLOGIES, INC.               TRIDENT GROWTH FUND, LP

                                             By: TRIDENT MANAGEMENT, LLC, its
                                                   GENERAL PARTNER


By: /s/                                      By: /s/
    -----------------------------                -----------------------------
       Mark Sampson, CEO                         Scott Cook, Authorized Member


GUARANTORS:

COMPUSVEN, INC.


/s/
-----------------------------
By:
    -----------------------------
Its:
    -----------------------------


STELLAR INTERNET MONITORING, LLC


/s/
-----------------------------
By:
    -----------------------------
Its:
    -----------------------------


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                                    EXHIBIT A


                                [FORM OF WARRANT]

<PAGE>

                                    EXHIBIT B

1. Section. 3.3 should state that there are 29,190,969 outstanding shares of
common stock. Schedule 3.3 should include 113,205 shares of Series B Convertible
Preferred Stock, warrants to purchase an additional 4,510,250 shares of common
stock, and employee options to purchase 6,120,000 shares of common stock.

2. Section 3.5 should reference the Borrower's Form 10-QSB for the quarter ended
December 31, 2005.