Full to Lite and back

For the purpose of doing demos, is there a direct method allowing me to switch back to Lite, and then back to Full again?

I would simply put Lite in another user account, but I’m going to be doing this demo over Skype. And of course I’d rather not enter my serial number in front of a group.

It should be sufficient to save your Script Debugger preferences file and then delete it to switch from Full to Lite mode. You can return to full by quitting Script Debugger and then restore your preferences file containing your registration information.