Blank Launch Center Display

[Hijack]

Recently my FMPA 17 client on one of my machines has decided to go bonkers and show me a blank launch center on opening.  It's literally just become a white window with "FileMaker Pro Advanced" on the title bar and that's it.  If I click around, it is responsive and will occasionally pop open options and such so I know the content is there it's just not visible.

I've checked my video driver (updated and rolled back), reinstalled FMPA 17 several times.  Uninstalled Visual C++ libraries and reinstalled.  Uninstalled anything I can think of that's video related.  But, nothing changes the status.

I can launch a database from an fmp://<server-ip>/database.fmp12 URL and it will load.  The layout content is visible as normal but dialog boxes are blank like the launch center.

Has anyone seen this and know a solution?  I have come across posts from folks relating the same issue with previous versions but none of those lead to a solution.

Thanks

-David