I thought I'd share a solution to a problem I encountered getting Colornavigator 7 to recognize my i1 Pro 2 spectrophotometer.
I followed all the troubleshooting steps Eizo recommends (manually select device, restart CN7, restart computer, reinstall software) and couldn't succeed in getting CN7 to recognize the i1 Pro 2. Finally, I opened Activity Monitor, found that an agent for i1Profiler called i1Profiler Tray was running in the background. When I stopped that process, CN7 was able to find the i1 Pro 2. This would probably be the case for any Xrite device where you have i1Profiler installed.