Preferences not saving

Today I had to delete preferences and empty the media cache. All good - Pr stopped crashing and works fine again, except every time I open the project I'm working on all preferences are reset: Default keyboard shortcuts, default workspace, default timeline preferences. 

The setting files aren't lost - I can just go and select my keyboard shortcuts, reselect my workspace - but it's a faff. Anyone know why this is happening? Is it constantly resetting preferences now? 

Thanks. 

James. 

(Mac - 14.6.1, M3 Max. Premiere 24.6)