In 2012, Stardock switched to Steamworks because of multiplayer.
Those games can't be downloaded from Stardock, only from Steam.
Note that Steam Mover can be used to move any folder around (by changing the Source Path), but for Steam the maximum benefit is in moving individual games from the Common folder.
I simply select a few games I don't play very often, and click the "Right Arrow" button.
This fires off a few command line windows - please let them run to completion.
For single-player games, account-based DRM often does not affect the game to any real degree, as you can play them with an offline profile without activation.
Because of this, many consider single-player account-based DRM to not be DRM at all because it does not require any contact beyond having the packages installed; no Internet connection is required.