Refresh Video Thumbnails Individually

Try a right click into the window to open the context menu and click refresh while pressing down the shift key. That should override the cache and re-load/re-create the actual thumbnail (s). At least that seems to work for me.
Let me know the outcome, please

-DG

Sorry to hear that....might be one of those 32 bit/64 bit differences...who knows.

I sometimes have luck if I copy the file in question and later on delete the original while giving the copy the original name (if that makes any sense to you)

-DG

That makes sense, and seemed to work. Thanks.