[Feature Request] Don't close the whole app at any error.

[TheK0tYaRa]

Is your feature request related to a problem? Please describe.
It should not crash if the path is invalid. For example, if "Override Exe" is set to explorer /desktop=anyname,1920x1090 cmd /c Torchlight2.exe

Describe the solution you'd like
There should be a verbose error that doesn't crash the app instead.

Describe alternatives you've considered
Or at least a non-verbose one that says what field was mis-filled.

[Dummerle]

Do you have an exact error message?

[Dummerle]

I pushed a fix, which shows a message, if the path does not exist.

I have to think about the feature request, because, if the app crashes, there might be some issues. After a restart will everything work.

You better use wrapper to set explorer as executable. I think it needs a better explanation in ui