Don't allow opening game EXE

[Erken22]

System Info
Windows 11:
Also please paste in the info from Help > About, assuming you can launch the app.

Describe the bug
After applying the mod and saving the changes, the game stops running, and the exe file of the game is damaged. If you do not apply mods but save the changes through the exe program, the file is still damaged

To Reproduce
Steps to reproduce the behavior:

Screenshots
If applicable, add screenshots to help explain your problem.

Mod Files
If you're having a problem with a specific mod file or patch file, please upload it here.

Additional context

[Erken22]

the problem is solved by creating a file in the patch.txt binaries folder and choosing this file instead of borderlands 2.exe

[apocalyptech]

Ah, yeah, BLCMM's intended to manage mod patch files, not the main EXE itself. Still, it wouldn't be a bad idea for the app to notice that a user's trying to open the EXE and fail more nicely. I'm reopening this and will put in some extra checking on file-open actions. Cheers! Thanks for the report!