Can you post a screen shot? Are you working with original images? Are your images on your internal drive or an external drive? Is it all images or just one image?
Original images on an external drive. There are multiple images, I am a wedding photographer. Any image I Click on I develop says loading and then nothing else will work and I eventually have to force quit. I would post a screen shot but I currently cannot get it to even open. I know it was updated yesterday.
Can you do a quick test and copy an image to a temp desktop folder?
Update the image location in the Library module and see if you can edit it in the develop module. If you can please check the permissions on your EHD just in case the update messed with that.
If you still can't edit in develop module when the image is on your local drive can you create a new catalog as a test and import the image and check that. If that works you may want to see if you have a recent backup to try.