I switched to LR6 earlier in the year and have had continual problems with launch. It simply hangs on the opening screen and won't do anything else.
I've talked with Adobe Lighroom on FB and they suggested I uninstall and reinstall. This worked. For about three days. Then I had to do it again. For another couple of days it works, then same problem. I've uninstalled and reinstalled several times and as you can imagine it is extremely frustrating to have this happen at least once a week. It's not good enough.
They suggested I post here and hope for answers and I'm really hoping I can get some. Worked in Lightroom yesterday with no problems. Tried to launch today and get the hang problem again. Not happy.
Please follow the below steps.
Go to Lightroom Preferences from the Edit menu
Click on Performance tab
Uncheck the Graphics Processor
then, Go to General tab
Uncheck the option " Show Add photo screen"
Let us know if that helps.