after killing the editor (...) the project cannot be opened

[laurentlavigne]

[SugoiDev]

Maybe check if the lock file is still present and remove it.
On Windows, it sits on “Temp\UnityLockfile” on your project’s folder.

[transat]

Restart generally does the trick here. The Hub doesn’t always pick up crashes.

[laurentlavigne]

gotcha, thanks