All saves deleted!

I launched the game today after not playing for two days. I was weirded out to see it ask me to select my language, and then when it loaded I saw that there was none of my airports to be seen!

I have been playing for two years and all of my data has been deleted and I am very frustrated. Why did this happen? Can I fix it?
I am on MacOS 11.0.1

3 posts were merged into an existing topic: [Solved] Save game lost due to incorrect directory path