I recently pruchased a commercial licence after running the trial for a couple of weeks
I followed the instructions and uninstalled PI. Then downloaded the Win32 image and ran it successfully
On starting PI, I got the message something like 'You have a trial licence, woudl you like PI to delete this licence for you' to which I said Yes. PI then exited which is not waht I expected.
So I then restarted PI, entered the appropriate licence codes and then PI began to load with a lot of messages appearing in the Console Window saying cannot locate *pxm.dll for each of the functions. On load completion there were no icons in the Process EXplorer
I restarted PI and everything appeared fine
I am running Vista SP2 wiht latest updates
HTH
Nigel