T1E stopped working

Hi, I need to delete thousands of duplicate posts caused by the workhorse plugin – same titles. The T1E plugin worked the first time, but doesn’t work now. I installed another plugin to check the duplicate count and there are lots. I tried deleting it and re-installing it but it still doesn’t work. I have Dupe Checks and Notifications turned on and my email address at the bottom. Help appreciated.

https://www.ads-software.com/plugins/tietools-automatic-maintenance-kit/