Office Reminders has lost a flagged document

I accidentally touched return while one of my Office Reminders flagged documents was highlighted, and the flag and the document have disappeared. I presume it's been cancelled, and since I can't for the life of me think what it was I can only hope it wasn't too important.  This Office Reminders really is one of the most un-userfriendlty applications I've encountered in 25 years with a Mac.  You really would think Microsoft wouldd have made a better job of it by now, but it just seems to be getting worse, along with Outlook which has become an overcomplicated shambles while a lot of the basics are still dire.