It sounds like it. Can you give details. Check your browser history for where you obtained it, post back which site it was.
From what we know but there are more out there, here's a list of .. Known Scam Sites (click on link)

As far as the payment goes, cancel it ASAP via your CC company. Explain it was a scam exploit.

However just to be sure. Double-check the link in that email, does it have a link to your personal download page. Does that page when you open it say LW Pro in the heading?