I installed the demo, but got a scary message from Zone Alarm in the process.  ZA told me that PZPro wanted to change the settings on my PC so that any application could then run a dubious program prior to starting up.  It asked did I want to give permission, so I refused.  I then got a series of error messages about not being able to write stuff to the registry.  However, after all that, the demo seems to work OK.

Just worried that I might need to give those permissions to get the registered version working....