Assuming I have the source code (a big if), I will still need authorization from the vendor to modify the source. And even if I do get that, as an end user, all

Assuming I have the source code (a big if), I will still need authorization from the vendor to modify the source. And even if I do get that, as an end user, all I want to do is double-click on the icon. I am not going to be writing any patches, or wanting to pay someone to write patches. I prefer to simply pay the $100 Microsoft tax when I purchase my PC and let MS worry about it.