FMPerception identifies each installation with a Machine ID. This comes in handy when we need to help de-activate or uninstall FMPerception, and install it another machine. So we might ask you for it, if were are helping you with that sort of thing.
You can find your Machine ID on the FMPerception Registration dialog, that you can get to by selecting File-> FMPerception Registration/Trial from the Menu. Click the version string in the lower left hand corner, and your ID will be revealed.
This video walks through the steps of getting your Machine ID