Dean, yes you can backup the database on your dev machine, install MC on the new machine with the restored license, then import the backed library. Like you said, you will be missing the actual files, and you can re-rip them, but do you plan to rip them in the same format? i.e. mp3? If not, the library will show incorrect extensions. i.e. you library now shows path/file/name.mp3, but if you rip into ape format (I definately suggest some sort of lossless) you will have files with path/file/name.ape.
What you'll want to do once you have all of the files re-ripped is just do a find/replace on filename and replace .mp3 with .ape and it will correct the filenames to match the correct files you have re-ripped. Of course .mp3 and .ape may not be right, but the method will work. You just have to make sure that you re-rip into the same directory structure as on the dev machine.
You will also want to backup the actual cover art folder(s) on the dev machine as you'll need to move it to the new machine as well. make sure to put it in the same place on the new machine so the library knows where to look.
Finally, if you have custom view schemes and playlists, i think you'll have to back those up also, but can't remember now where they are stored, so you'll have to do a bit of looking around.
If possible, i would suggest you install MC on the new machine and back everything back up before wiping it off the dev machine, to be sure you got everything.
good luck, and I'll be taking a look at your software in a few months when i get back to the US and actually have a home again.