I have a similar problem. I've downloaded and install NDI Tools 5 for Mac multiple times, I even uninstalled all NDI apps. When I reinstall, I'm back to the old apps. Some say version 3, some say version 2. One app (NDI Monitor) reports version 5, that's the only one.
Same here. Also the Mac version of the Scan Converter is lacking some serious features (mostly audio stuff) that are present on the Windows version. The absence of these features make it damm near unusable.