License Problem when trying to open older Unity version.

[DemolitionDerby]

Hi,

I have been using Unity 4.6.9f1 for a while and also Unity 5.5.2f1 on the same computer without a problem for a while.

I had not touched Unity for a couple of months but when I tried to open Unity 4.6.9 again, I got an error message telling me there was a problem with the license.

I was redirected to the login page, so I logged in and after that I get message that is has been activated successfully an messagebox pops up and tells that “A valid Unity license is not available.” and Unity closes so I cannot use it at all.

I tried to uninstall and reinstall multiple times, repair, tried to delete registry keys, nothing worked.

Is there anything I could do in order to clean Unity completely or something I missed maybe?

Thanks

[dandeentremont]

I’m also getting this for Unity 4.7.2
Just trying to exhume an old project so I can record footage from it.
Attached is the result when I select the option “I don’t use Unity in a professional capacity.”

[dandeentremont]

Okay so turning off wifi and using the manual activation process seems to work.