I can only suggest the usual.
Clear cache and cookies (don't know if that applies to TL, but it seems to be a solution to many evils).
Reboot computer.
Failing that -
Uninstall TL then download and install a current copy of TL.
Do a full system update.
Restore your listings from your most recent (current?) backup.
Make sure you regularly backup and regularly install updates. I do this daily and haven't had any issues with TL for nearly a year. Touch head wood.
I could well be trying to teach you to suck eggs, but that is all I can suggest.
