I upgraded my iMac to OS X Maverics, yesterday, and Photoshop Elements 11 stopped working. The application opened but when I tried to open an image, virtually all the menue options greyed out and the application hung. I force closed Photoshop Elements, uninstalled it and re-installed it but the same thing happened next time I tried to open an image. I did find that I could open the image by clicking on it in inder and using "Open with" but this isn't satisfactory in the long term. Please help.