Solved and will be included in next release.
For quick fix please:
1. Open any MySQL client and login to your vBulletin database
2. Execute query (add table prefix if you use it):
Code:
UPDATE usergroup SET genericoptions=32 WHERE description LIKE 'vbet_%'
3. Go to Admin CP -> Usergroups -> Usergroup Manager
4. Click Go to edit some usergroup (no matter which one)
5. Click Update without any changes.
Please note that 3 last steps are to trigger vBulletin cache refresh (rebuild ranks, permissions and so on). You can see it working going to Admin CP -> Users -> View Banned Users. Before changes you will see there all vBET usergroups. After changes vBET usergroups will disappear from the view.