UNITY WONT REGISTER..PLEASE HELP ME!

unity wont register. i open it on the desktop and click on register. i then click the internet activation and it comes up with an error. i then try to do it manually, i click on save licence and then next, but when it says to click on finish i cant cause its not highlighted!!! please please help!

you need to manually import the licence if memory serves me right
replace the exe the start unity then manually import the licence