Hy! I changed my windows from 10 to 7 and after 3 days of using Unity I got License Error.
I cant hit the Re-Activate button, I also tried to sign in but when i clicked this button twice(because for the first click nothing is changed) i got this blank window.
After that i cant do anything, when I close this window and re-open Unity, I get again the License Error.
Anyone knows what is this problem and how can I fix it?