"Update project" workflow overwrites settings.json::wurst.wc3path with nonsense value if left "optional"

[Cokemonkey11]

The wurstsetup GUI exposes this thing:

If you just leave the text as it says, with the optional text, then pressing Update Project will go and dump nonsense in your project's settings.json:

You can trivially repro this by deleting the line from settings.json and repeat the "Update Project" button