De-activated the 2.x plugin, uploaded 3.x files, re-activated plugin, getting the following error:
There was an error locating the database tables for AdRotate.
under "Manage Ads", "Manage Groups", and "Manage Blocks". "User Stats", "Admin Stats" and "Settings" all work.
Even manually deleted all the database entries for the plugin and re-activated it, still have same issue.