Yes, for any graphic design / web design / email template design, or any other type of design, once fully paid, then you own it and can have full access to the master files. The ownership of any logos, flyer designs and graphics will be transferred to you once the project has been paid in full and completed. You may then use them as you wish.
Exceptions
Stock photographs that you have provided for your design are your responsibility / liability and we expect you to have gained copyright approval before sending any files to us.