I have used Lightrroom versions 1 to 5 no problem. Upgrading took a simple download. LR 5 to 6 has proved quite different.
I have followed this link : Adobe Photoshop Lightroom Help | Serialize Lightroom CC trial to activate as Lightroom 6
Signed out of LR quit LR, started over, put in new codes - but I always get the message " Lightroom mobile expired."
I never had a CC subscription. Please help.
Pause LR Mobile from the identity plate. Click the down arrow next to whatever it says up at the top left, and click the Pause button on the Sync with Lightroom Mobile line:
The LR you initially installed was LR CC with LR Mobile. I'd think that serializing LR CC to LR 6 would automatically remove LR Mobile which is only part of LR CC, but maybe it doesn't and you have to manually stop it.