I think those notes were created in response to support traffic. However, they seem to contradict the communication from the product owner Greg via his blog http://scn.sap.com/community/lumira/blog/2014/11/14/governing-lumira-desktop-using-bi4
i'm going to ask James and Greg to clarify.. undeniably, there have been quite some changes behind the scenes to the solution's architecture.
To clarify, you can definitely Save (.lums files) to BIPlatform 4.1.5 without the Add-On. What isn't clear here is whether your CMC can govern Desktops without the Add-On.
Regards,
H