Fix: Fixed an issue where execution via URI or alias could run different version of Files

[0x5bfa]

Resolved / Related Issues

To prevent extra work, all changes to the Files codebase must link to an approved issue marked as Ready to build. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.

• Closes #13112

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Open stable and preview (and dev as well)
2. Enable open in background
3. Click task tray icon
4. Check if correct version of Files opens

[gave92]

~IIRC "Files.exe" might also be encoded in the .reg file to set Files as default.~ Nope, it points to "Files.App.Launcher.exe"