Sorry, but I NEVER enabled the "buildings" feature on WinCE/Primo a) because of storage space, and b) because, in reality, no road runs right through the middle of a building 😏
It also never made sense to me to install anything other than iGO Primo 2.4 on WinCE.
*** Plus, my experience was that licenses played a crucial role in WinCE-based iGO...

...but as I already mentioned, the WinCE era is long gone 👋👋😂