I'm sorry to hear you're current save is still unplayable. You might try fixing a new save and try playing it to see if that might help?
It's recommended to -not- use fixed world files if Overwatch is installed as it fixes a lot of the routing issues and is newer than most of the world fix files.
The cache files do regenerate each time you play, that's why some suggest to delete them each play session.
There's a way to disable some notifications from Overwatch and Register, if you have them. I'm also adding a few options from MasterController that are useful.
-- Overwatch:Settings and Options -
Sim > Nraas > Overwatch > Settings
Display Nightly Notifications = False
Stop Pet Adoptions = True
Reset Check = False
Stuck Check = False
Stuck auto-reset > (default is true) = False
-- Register: Show Notices -
Click on Mapview > City Hall > Nraas > Register > Show Notices = False
-- MasterController:Clear Notifications -
Click on Mapview > City Hall > Nraas > MasterController > Town > Clear Notifications
Reset Everything -
Click on Mapview > City Hall > Nraas > MasterController > Town > Reset Everything
Reset Lot -
Left-click on Lot, Nraas > MasterController > Reset Lot