I have recently bought CS6 and Lightroom4 and all seemed OK after installing. A little while later no images opened in CS6 when using "Edit in" in LR4. LR would launch CS6 and prepare images for editing but they would not appear in CS6. Tried all sorts of ways to fix and had to uninstall and reinstall. After this CS6 worked OK again for a few hours and then once again I couldn't open any images. I can't open images from folders etc. I have to uninstall and reinstall every time I need to use CS6 which is not very time efficient! I am using Windows 7 x 64. I have previously used CS5, CS3, Lightroom 2 and 3 with no problems.