After updating to 4.0.5.0 all display names were changed.
I tried to reset them using Tools > Options > Display Titles...
and set all options to %FILENAME%
I than did a Maintain Now and everything was back to normal.
After the next scheduled maintain they changed back to showing Title for everything (regardless of Movie or TV). The settings did not change, and continue to show %FILENAME% for all.
When looking at the individual playlist options they also show all as %FILENAME% even though they display Title.

If I select to update all information it will change them to Filename but at the next scheduled it reverts back!

Can anyone help with this?