It sounds like you have done everything possible to get it working, the unit itself might be defective (as you suspect), the software has issues but for the most part works well. If you are not too fed up with it, you could return it for another one.
The problem of trying another copy is that before I even plugged in the CM device, the downloaded software installation had problems.
The message right from the start after rebooting indicated this so I can't see how a new device would help if the downloads show a software problem.
If X-Rite offered the option of receiving a disk instead of the download, this would eliminate the possibility of download errors causing the issues.
As I've downloaded large files before from other software companies with no issues, I can only assume the X-Rite software is problematic... though it puzzles me why some users have not had this issue if we're all downloading the same thing!
I really want this device to work but cannot spend my life chasing up issues with it.
I've already wasted many hours and will wait for release of version 2 I think.
The retail outlet is trying to follow up my issues with X-Rite but as I've not heard from them either, I assume they've not got far either.