The develop module in my LR6 is not working. The is only displayed a blue screen with a large cross across frame. I can see photo in window at upper left hand i develop module. Photos are shown in Library module. This problem applies to all my photos, both previous imports and one import after upgrade.
I have upgraded from LR5.x with normal download / installation without errors. I have also tried to de-install and install again. I am running Win8.
Any help / suggestions would be appreciated.