Q. Migration process for 1.11.x (or older).
A. Install 1.12.x (or newer), then install Sticky Thread Ordering or Who Replied as required. Any permissions or data are transferred into the formats these add-ons accept, and Moderator Essentials will no longer remove those permissions or data on uninstall.
Q. I need to revert thread title changes
A. Please use my free add-on Thread Title HIstory to this functionality.