I'll give you the benefit of the doubt and just think you meant "license device", whether that means software license number (challenge response) or dongle, or in some cases the file you have to copy to the directory of the plug in (I don't know of that many plugs that use this, I think sonalkis does, as well as stillwell audio).
As far as I know the answer is no, the easiest way (to my knowledge) to move from computer to computer is a dongle, most of the plug ins I have purchased only let you license it on 3 machines (although I think that is plenty personally) unless you use a dongle (then who cares, you just move the dongle). All 3 have to be installed, I think challenge response unlocks use your computer's ID or thumbprint in order to unlock it (that is why you have to be online yo!). I suppose the 3rd method would just involve taking the license file along with the plug in.
That's how ya do it legit. FWIW most of my challenge response plugs had the ability to move the license to my ilok (and therefore I just did that).