After opening the game I enter the licence number, everything is locked because I apparently haven't registered it.
So I restarted the game and the problem persisted, I tried deleting the licence.dat file and redoing the process, the same problem occurred.
I decided to open the licence.dat file with Notepad++ and saw that my licence number was in there twice, which is what I assume is the cause of this problem.
But if I edit the file manually to have my licence number only entered in once, the next time I open the game it deletes the licence.dat file and then I'm back to square one.
Any assistance with this frustrating issue would be much appreciated.