The Adobe Store allows me to select RH 10 to upgrade from RoboHelp 10 only. Please let me know if I cannot purchase the Adobe RoboHelp Office 11 - Upgrade at all.
Sorry but from RoboHelp 7 you have to purchase the full version.
There is one price from RoboHelp 10 and a lower price from RoboHelp 11.
With all earlier versions you have to buy the full version.
Thanks very much for sharing that information!