I installed 2.10 and activated Rome to Victory, but some of the units are not appearing.
For instance this screenshot from "Casili Road"
In "Smokey's Challenge" no Allied infantry units are visible.
In "Flames in the Mist", the vehicles Archer and Carrier Wasp are visible, but M1O Wolverine,Scout/Carrier and Otter are not.
The menu reports v.2.10, Game Engine 4
My guess is I missed a step, maybe an upgrade.