The first symptom was that double-clicking the tray icon doesn't open Everything. So I tried ending Everything tasks I could find from Task Manager and then launched the app. After a few seconds, Everything freezes with "Updating database..." in the status bar. Waited a few minutes but no response. I tried this 3 times with the same result. No disk errors were found from Windows 10 disk scans.
I'm attaching a log file from
Everything.exe -debug-log