I've learned that some times it's best to simply reset all settings.
The corollary to that:
It is ALWAYS a good idea to save ones user profile and workspace settings to someplace safe.
And then when something weird, or unexpected happens, one can restore those settings from the saved profile.
(not sure IF LT allows for user profiles or not?)
It looks like it does, but it stores it in the REGISTRY, hmmm so one can export and save that for emergency usage!