The Upgrade Protection means you can get all the new versions, including major updates, for free in two years. The price is the 30% of the order total.
For example, you purchased one license of FTP Synchronizer Enterprise, then the price of Upgrade Protection is $89.95*30% = $26.98. The total cost will be $89.95 + $26.98 = $116.94
The Upgrade Protection is optional.