I've purchased the whole bundle of Walls, Truss, and foundation. Walls and truss work fine however only part of foundation will work. The slab section will work but everything else doesn't. I tried uninstalling and reinstalling the latest version 1.7.4 several times. Each time I go to globe setting under licensing and input the serial number just for the foundation plugin but it always comes back to TRAIL VERION. Also in Sketchup extension manager, it shows Walls as a signed version. It shows Truss as invalid signed and with foundation it shows it signed.