The Terms and Conditions says, in part,
This is a 3-computer lifetime license
however on the Tenorshare website, the regular version that sells for $54.95 is listed as a 1-computer, 1-year subscription (“use it for only one year” vs “use it as long as you want” for the others). There’s no lifetime 3-computer version offered for purchase at any price.
The “subscription” part may refer to tech help, or not, but in any case the conflicting info makes unclear what happens in the event that you need to boot into a dead Windows 1 year and 1 day after installation, or want to upgrade this license to a newer version when one is available.