Photoshop :: PS And Bridge Will Only Open Jpeg In ACR

I'm trying to open JPEGs into PS from Bridge. No images will open in PS UNLESS they can open in ACR first. I have my PS preferences set to not prefer ACR for jpegs. Bridge preferences are to open jpegs in ACR. Up til today, that's worked perfectly - I can use ACR from Bridge, or right-click and go directly to PS without opening ACR. Now, if I right-click and select PS, nothing happens (PS is open, but no picture loads). If I double-click, the image opens in ACR, and if I then select "open image", PS comes up, but no image... It's like PS will ONLY open an image through ACR. I have already reset preferences on both Bridge and PS, and cleared the Bridge caches, with no change in performance.