Getting in a mess.. Help me!

I don't know if this has been asked before, or if this is the wrong section but I bought Object Desktop 2 years ago, and now I have a new computer. I am trying to recover my software.

I have downloaded Impulse, and everytime I try and install OD, it just tells me that my registration has expired. I know it's expired and don't wish to renew it but would like to recover the software that I originally bought.

Before, I had Stardock central, and could restore the archive from there, but this isn't working with Impulse.

Sorry for the Noob'ness, but how do I get my OD back!!?!