Its possible to archive it -- you could try unpacking the archive on the new computer. You'd need SDC installed on both, of course.
[full directions from GC2 for transfer/offline install, which mostly applies here]
To get the download version of the game (or the patch for a retail copy) up and running on an offline machine:
1) Install SDC on an online machine (keep a copy of the SDC installer handy).
2) Log in on SDC, head to the Games section, right click on the game, and choose Archive Application->Download and Archive. If the game is already installed and updated on this machine you can choose Archive Application->Selected Application to pack it up without redownloading.
3) When the archive process finishes, you'll find the .sdc file(s) in C:\Program Files\Stardock\Stardock Central\BACKUP (this path is customizable in SDC's settings so it may vary). Copy the .sdc files along with the SDC installer to the portable media of your choice (CDR, DVDR, USB drive, etc).
4) On the offline computer, install SDC, then double-click the .sdc archive files in explorer to unpack them.
5) Run the game; you'll be prompted to activate. Enter the appropriate information to complete the activation process.