I'm not Conitec but because you purchased a per-developer license of 3DGS, you are the owner of 3DGS and other users using your same computer can't use 3DGS.

But what you can do is if you purchased more than one copy of 3DGS, you can have 3DGS installed in something like this:

User 1's licensed-copy of 3DGS:
C:\Documents and Settings\User 1\Application Data\Conitec\3DGS\

User 2's licensed-copy of 3DGS:
C:\Documents and Settings\User 2\Application Data\Conitec\3DGS\

User 3's licensed-copy of 3DGS:
C:\Documents and Settings\User 3\Application Data\Conitec\3DGS\

...and so on.

Having each copy of 3DGS in Users' accounts are great for when users (except you since you're the administrator of your computer) are running in Limited Mode in Windows XP.

Conitec, please correct me if I'm wrong.