Can't reactivate Unity

Hey guys, I wanted to reactivate my Unity because I bought a new licence, but I can’t get it to work. When I start up Unity, click Help-Enter serial code it shows me a popup window saying that I already have my Unity activated, so I click reactivate. All that happens is that the popup window disappears and Unity freezes.

From Unity Support:

It sounds as if you need to clear your existing Licensing files. These can cause the Editor to hang upon Reactivation.

Give the steps below a try:

1.Uninstall Unity
2.Delete this file:

  • WinXP/Vista: C:/Documents and Settings/All Users/Application Data/Pace Anti-Piracy/License Files
  • Win7: C:/ProgramData/PACE Anti-Piracy/License Files
  • Mac: HD/Library/Application Support/PACE Anti-Piracy/License Files
  1. Restart
  2. Download Unity again from our website, since your original install might be corrupt.
    http://unity3d.com/unity/download
  3. Reinstall and test