userMenus.xml records edits made to various menu resources. There are a ton of deletes recorded for the _mdi_menu. It gets applied any time the config is upgraded (also when you switched from 28.0.0.0-beta 1 to 28.0.0.2-beta 2) . There's no way for me to know when the edit's were made and why there are so many deletes.
userMenus.xml is bad. If you want to keep the rest of your original config, do the following:
- Exit SlickEdit
- Delete 28.0.0\userMenus.xml
- Delete 28.0.0\vslick.sta
- Run SlickEdit and 28.0.0\vslick.sta will be regenerated.
Instead of deleting userMenus.xml, you could remove all the menu edits for _mdi_menu in userMenus.xml and let the other menu edits get applied.