Hello,
I have the same problem. I had a free license viewer installed on one of my computer and yesterday, it came back to the trial version. We try to add the key back in the License Key Storage section. When we paste de key and click on add, the license doesn't show in the upper section. Also, all the settings are no longer saved so if we closed the viewer, it lost all his setting when we open it again.
Thank you for your help.
Jonathan