I've tried to get the game running after some period of inactivity, and unfortunately I'm not satisfied with the results.
First I tried to update the original installation of CMANO, but it couldn't update to 1.09 because downloading the patch from your FTP failed all the time. Reinstalling the original doesn't help, because the download link Matrix Games sends you is for 1.02 version, and it predictably fails on update as well.
Then I've installed Northern Inferno (1.09), and it recognized my initial copy of Command, but it can't update either because of the same problem with FTP. I'm seeing the updater trying to connect to an IP in France. This address pings fine.
In addition, it has another problem with launching the updater from game's launcher. The error message is as follows: "Windows cannot find '\update.exe'. Make sure you've typed the name correctly, then try again." Maybe it's just me, but I think there are two dots missing in that path. This is not critical of course, since I can run update.exe manually.
Lastly, I wanted to ask: when doing clean installation, do you need to install the original Command before Northern Inferno? It appears that just installing the latter and providing your original command serial gets you the full game.