Hi Anton,
Welcome to Microsoft Community.
I understand that you are having issue with associating the correct program icon after renaming them and you have to restart your computer every time for the changes to take place.
Unfortunately the issue that you have mentioned over here is more suited for the Microsoft Developer Network (MSDN) community, so I suggest you to post the same in MSDN forum for further assistance with this issue. Here’s the link for it:
https://social.msdn.microsoft.com/Forums/windowsapps/en-US/home
Thank you.