First thank you for updating this, i really missed it.
But i ran into a strange problem. I added it to a running game and the GUI toggle button doesn't show up. Even removing all mods, except base game + space age, didn't fix it. But when i start a new game, even one with all the mods i currently use, the button works just fine. After a lot of digging it feels like the GUI unifier mods, that supports the original WIM version, does something that persists even if i remove it. For now i "fixed" it by adding a "toggle" command tom /wim that does a toggleWindow. Maybe there is something you can do, but at least others trying this one will know that this might happen.
