I have just migrated from on older (2011) macbook pro to a new one. Lightroom worked well all day. Then at night it did not open anymore. If I click on the LR icon to launch it, a red Adobe logo with PDapp lights up fior a second , recedes and nothing happens. Lightroom just does not start to run. What to do? I tried uploading a newer version, but when I click on the Adobepatchinstaller app after double clicking on the downloaded dmg file for LR 6.6.1nothing happens either.