[BetterRed]

Try this

• Open the config folder: click the Preferences->Miscellaneous->Open... button.
• Close calibre
• copy the file tweaks.py to tweaks_save.py, in case you make things worser
• open the tweaks.py file in a text editor (my choices would be Notepad++ for Windows, TextWrangler for MacOS, Emacs for Linux)
• look for sort_columns_at_startup = set it to None
• save tweaks .py
• start calibre
• should be OK
• don't forget to delete tweaks_save.py

BR