If you try to delete settings files or addons, log out first. And wait a few seconds.
You cannot (really) delete Saved Variables while the addon is running (as the game uses a memory copy of the values from the disk).
What you describe sounds like it could be caused by a parsing error in the .lua files. Wich results in the nessesary events never being registered (for all purposes the .lua files themself are just function calls similar to a constructor).
There is a know bug that
LibDebug might surpress/swallow those kind of errors. Make sure you have any Standalone Copies and every addon with locl copy of LibDebug disabeled (just turning functions off is not enough!)
The only way to be certain it is thsi addon is to turn every other addons off (
especially those that could not possibly cause such a problem).