I also have an X-Rite ColorMunki Display colorimeter. FWIW, I found that the latest version of the X-Rite i1Studio software (1.5.1) is available for free and seems to work slightly better than the dedicated ColorMunki Display software (the latest version of which is maybe 1.1.2 or 1.2.4?).
Calibrite also offers newer software, basically a version of the X-Rite i1Studio software, for free, and it works with the ColorMunki Display. However, the Calibrite software actually seems to lack a feature or two from the older X-Rite i1Studio software (like the option to correct for ambient light reflecting off the monitor). I uninstalled he newer Calibrite software (specifically, Calibrite ccStudio 1.1.2) and reinstalled the older X-Rite i1Studio software.