I Just shut down 8823 and loaded a project in 8858 that loaded the same project I was working in. Bad news :(
Key settings were lost:
Sources (path definition of Content root) are gone.
Dependencies are gone!!!! (libraries, jars)
When reviewing the .iml files (using a backup), I noticed a few missing pieces (.ipr is ok):
a few thousand lines missing in the xml file.
I cannot find one single reason to think this was done by my machine (MBP), but can´t be sure.
I think this happened when opening the file.
Any project file migration in process when opening the file?