I have found a bug. I was on the wave editing level zoom(didn’t edit anything), then I clicked the button to skip to the beginning of the project. Then it crashed, as well as I can no longer enter the project with the backup option. I will further investigate on what triggered the crash, hence I cannot reproduce the result.
I was editing one imported audio to fit the tempo of a song, for context
Not surprising. Audacity 4 isn’t ready for primetime yet.