Hello,
I am from Bangalore India, and have been working on C++ / Qt and Perl for about 6 years now.
I have written many desktop applications in Qt.
I have no issues if you pay after the testing is done, as long as we have the project assigned on freelancer.com.
Please let me know more about the changes, I assure you that this can be done in this weekend.
Thanks,
Shweta Vidyasagar