Buttercup Desktop won't open on Windows 11

I solved this by noticing something wrong at the %USERPROFILE%\AppData\Roaming\Buttercup-nodejs\Config\desktop.config.json so try by deleting the Buttercup-nodejs folder and check if it worked if that is the same as my case:

I was having the same trouble but on W10. In the Task Manager it's seen initializing but after a while it just close. The log shows everything going right I think, it terminates with [INF] 06:06:19: Application ready so that seems all worked right didn't?

Steps

• So snooping some files of the Buttercup in the %USERPROFILE%\AppData\Roaming\ I've noted two Buttercup's files: Buttercup and Buttercup-nodejs
• Then, I've moved them and tried open it again and it just worked.
• Snooping again I've noted something on the old folders, more exactly at the Buttercup-nodejs folder here Buttercup-nodejs\Config\desktop.config.json the .json file was empty but not the new.
  P.S.: Save the new desktop.config.json's content
• With that in mind I moved the old ones again to its default location (by deleting the new ones of course) and I've got the same old thing (did not open)
• So adding the content of the now deleted desktop.config.json file to the old maded it work again

So just deleted that folder or move it. That was my workaround.

I hope it helps