@Gary
On the right side you have regulations. Regardless of the form of purchase, the license is valid for a year.
https://sharewareonsale.com/s/free-vsdc-video-editor-pro-100-discount
Terms and Conditions
This is a 2-computer 1-year license, for noncommercial use
You get free updates for one year
You get free tech support
You must redeem the license key before this offer has ended
May not be resold