I'm using Unity 5 Personal Edition. I have run into the licensing crash problem, in where when I open Unity, it says, 'Licensing issue detected! there was a problem with the license because the Operating System identification seems to have changed.' How do I go about fixing this? I have looked around Unity help forums and surfed the web for a while but I cannot find an answer to this problem. Also, the bug fixes page on the Unity website that says to delete the .ulf file in C:\ProgramFiles\Unity did not work as there was no .ulf file in there. Please help!