Curt- Yes, thank you. As I said previously, I've reset preferences. I appreciate your input regarding re-install and it's limitations.

I found by accident that by individually accessing (within Bridge) each folder containing images, keyword search is restored on a folder-by-folder basis. Waiting for thumbnails isn't necessary, only long enough for the thumbnail placeholder to appear - thankfully.

With thousands of folders, it's a hassle, but it works. My hope is that the root cause of this issue doesn't reappear in the future.

Thanks again for your input.

Les De Moss