I think the registration form needs to be updated.
The question where you have to enter the latest version of Polyworks is well out of date.
I only managed to register by guessing which version is correct.
I'm not sure if this forum still has an admin or the contact email is still current as my email query went unanswered.
Glad I found this forum though as I've been looking for a Polyworks one for ages.
Whoops! Maybe that's why there haven't been many new members lately... I've fixed it, thanks for letting me know!