you never reinstalled vorpx before ?
typically when you reinstall windows, when you reinstall vorpx, you are being asked to enter a key to activate it, you get a request key code which is linked to your email you used when buying vorpx. it usually only takes a few minuts to get the new key.
get that new download link to download vorpx then start it and request a new key by writing an email to the support, make sure you provide activation request code + email you used to buy vorpx.