The last thing I have from Harris, dated February 2017, shows RPM is compatible with the following:
Windows Server 2008 R2, 2012, 2012 R2
Windows 7, Windows 8/8.1, and Windows 10
I don't have anything newer than that. However, I do have RPM on order as well as a new Toughbook 55.
I do believe RPM 14 is the latest and it is compatible with the XG-100's