I think I'm ok. When I updated my Adobe Acrobat 2015 Classic, after Adobe said an update was available, it evidently installed a new Adobe Acrobat with a 7 day trial, and that was overriding my efforts to log into my Adobe Acrobat that was working successfully yesterday. I uninstalled the version that was downloaded when I tried to update and how Adobe Acrobat 2015 Classic seems to be working again. I now realize that I should not install any updates that Adobe tells me that are available, correct?