Not really a question. More of an observation.
This morning I started TeamViewer to connect to a customer and the connect button was greyed out. I tried other solutions involving Options->Advanced->Access Control, but this was already set to Full Access.
After doing Alt-Ctrl-Delete I discovered there were several copies of TeamViewer running. End Tasked all of them and restarted Teamviewer. Notification of new features came up and I now had a good connect button.
I can only assume that an update was done automatically and TeamViewer was not able to be restarted properly after the update.
Luca