Install BeerSmith on your new machine. once you've entered your keycode, close the program.
Go to documents. Locate the BeerSmith2 folder and rename it BeerSmithbak.
On your old machine, go to documents, locate the BeerSmith2 folder and copy it in a way that is accessible to move to the new machine. A flashdrive is simplest.
On the new machine, copy the BeerSmith2 folder and paste it into the documents folder.
Open BeerSmith. Your recipes and profiles should all be there.