problem displaying all active files

[Old Man]

FM 7 Pro on a Pentium III has recently started misbehaving. I typically have five open databases & never had trouble switching between them with the WINDOW drop down menu. Now I do, but only after I open a specific one of the 5. It doesn't seem to matter which order I open the databases in; once I open the TroubleMaker I cannot use "open recent" to open others, or the Window menu to access them if they are already open. none of the files are big. Thanks.

[Old Man]

It's still doing this (& messing me up big-time); anyone got a fix? Sometimes it "fixes" itself if I leave it alone for a few hours, but it always pulls the same stunt the next time I need to open my databases (like after a mandatory restart).