What is your upgrade policy?
For our customers, all upgrades are free as long as they have a valid active subscription. When the subscription expires, renewing the subscription will cost €199.= per seat.
Upgrading from v4.x to a v5.x subscription costs €199.= per seat. If you have a v3 license or older you have to pay for a new v5 license which costs €299.= per seat (with volume discounts, see https://www.llblgen.com/pages/buy.aspx)