Hello,
Andy here, English programmer, I am very interested in this project you have posted.
I can certainly create a program to backup / restore these file types on a windows machine, and it will be compatible with all versions on windows XP and later.
I work extensively on windows security / backup and registry and have lots of examples, I can give you a link to plus I can provide many references should you need them.
The code of course would be yours i.e. copyright to you, no problem there at all.
I presume you don't mind what language it's written it as long as I can supply the exe file and the source code, which I can.
By UX, are you referring to user experience, or uninstaller? either way I could do something along those lines as long as you can clarify what you are after.
I propose we start with a nice easy user interface, keep it simple, and easy to use, and the program will do the rest.
I've stated 7 days in the bid, but it might be done quicker, just have to see on that one.
I hope you like my proposal, if so, please contact me here on Freelancer, and I will get back to you as soon as I can.
Thank you for reading this,
Andy.