I upgraded from 5.7 to 6 and whereas LR5 would start up and go straight to the import screen when an SD card was inserted, this no longer happens with LR6.
I have checked the box in preferences 'Show import dialog when memory card is detected' and LR6 is shown correctly in Windows 7 autoplay settings for pictures and mixed media. I appreciate it is easy enough to hit a short-cut to import whilst LR6 is open, but it is annoying that for some reason LR6 will not fire up and do this automatically on my PC when the card is inserted. Anyone else having this experience or know of anything else that I can try to resolve the problem? Many thanks.
Check your autoplay options in the Windows settings. Windows may be still trying to launch LR5, which you probably uninstalled.
I have been advised on Lightroomforums.net that this issue is a bug with LR6 and one of the moderators on that forum has notified Adobe.