Activation Key is not being saved when entered. It goes from restricted to full version when key entered but key disappears when program restarted.
  1. Paste Activation Key and check that all symbol were copied and no extra characters added
  2. Click a small Apply activation key button next to a key field
  3. Check that Full version text appeared in window title. That means AK is correct
  4. Now your program is activated and all demo restriction removed.
If AK still not saved, open ACLOCK.INI file with Notepad and check Activation Key value in the INI-file

For more assistance contact technical support.