I just updated Acrobat DC (Continuous) from version 20.013.2007 to 2021.001.20142. I am stuck in Certified Mode. I've tried running repair Acrobat installation and that didn't work. I've checked and unchecked the option in Preferences > General. Restarted Acrobat. Restarted Computer. Nothing is working to get me out of certified mode. I am trying to test a third party plug-in and unable with certified mode set.
I am having this same issue. I know the plugin is valid because it works on the adobe acrobat dc pro that installed correctly that is not in "certified mode". I have uninstalled, used the cleaner,stopped all adobe tasks and it still stuck in certified mode. I have clicked the box and unclicked. It tells me to exit and restart adobe. I do that an nothing changes. I do not know what to try!