The protection system used by VA is a pain in the ar$e, as it means it no longer runs on my work machine when a USB bluetooth dongle is plugged in, and there is no point in re-registering as we've got a number of these dongles and swap them around as needed.
As I don't have a PC and want to use VRPC on which ever machine at work I'm currently using, its non portability restricts the usefullness serverly. I have suggested a version locked to a serialised USB pen drive which is just as secure (we use it for products costing £1200+), enforces single copy / single use, and removes any possibility of registering a new copy and continuing to use the old one. But its only been greated by with stupid comments by those that should know better on csa.misc