AutoStandByPro Plus is a one-time purchase. Open the “Activity Monitor” window and from the “Help” menu select “Purchase Plus License...” to open the purchase page in your browser, or go to www.autostandbypro.com directly. Either way it compares the free AutoStandByPro with AutoStandByPro Plus and shows the current price.
After the purchase you will receive your license key by email. One license key can be active on up to 5 of your own computers at once. To turn on the Plus features, activate the license key in AutoStandByPro.