I am so sorry my solution did not work for you.
My problem may be a little different--I never got any message about not having an internet connection when trying to activate, it just kept sending me back to the login screen each time I tried to activate in an endless loop. My system showed I always had an internet connection.
Just to clarify my original problem, even when unable to activate TT, I was able to download and the run the file for installation and then see the created exe file...I just could never get it to activate so I could open and run it. So if you have been able to actually download and install and just not activate TT, perhaps trying to change the properties on the exe file might work rather than the entire folder? This is just a wild guess.
Otherwise, to me (not an IT person) the no internet connection message might be an indication wrt your firewall/vpn blocking. It worked for me when my firewall and vpn were on but it might not work for other firewalls or vpn servers with different protocols. This is just another wild guess.
Sorry.
