I have had the same issues as you. I really struggled to get it working, it worked in other applications, just not Photoshop. Switching it to Zoom didn't work for me. I removed the specific applications on the ExpressKey Remote, leaving "All" and now, I can't add them back on without the Window shutting down! However, I have now switched from Auto scroll/zoom to Zoom and it now appears to be working again! I can't get it to reinstall my back up settings either. Any ideas on adding Applications? They are fine on the Cintiq screen, just problems with the EK Remote.
I finally managed to add Photoshop and Illustrator back on by using the Wacom Center, not the Tablet Properties, while the Apps were running, in case anyone else has this issue!