When I did the update to the latest 9.0.1 version, jobset windows appears empty (I looked at jobset file in notepad++ seems complete and not corrupted)
Same issue on Windows or mac distribution
This has just been fixed - take a look at this issue here (also has a potential workaround - but please back up your project before trying to manually edit files). The fix will be in the version 9 nightlies when they next build.