Hello, 

The Subscription based app Object Desktop ( which includes Fences ) is a Yearly Renewal Service .

LINK: https://www.stardock.com/products/fences/download

It includes all and any updates and /or upgrades to a newer version as long

as your subscription stays current .

If you buy Fences as a stand alone item it is good for life ( save your app download )

and you get updates while it is the current version any upgrade to a newer version you

would have to buy again ( usually at a discounted price ) .

Each app is good to use on One PC . 

AzDude
Stardock Community Assistant