Rollback isn't working
Rollback doesn't do any change, it doesn't get back to the last 'Commit', although I've unticked the safe updates box as you mentioned in a couple of videos ago.
Thanks for reaching out.
In the Workbench, there is the possibility to toggle the autocommit mode by pressing a single button. If you have pressed the tenth icon from left to right on the same line with the lightning symbol, that mode will be turned on, and each statement will be committed immediately. So, please press it and then use the ROLLBACK command.
Hope this helps.