This is printed in the Manuel, there is more information in the Manuel under installing Hoster move to a new computer.
Move Your Hoster to Another Computer
Be up and running in minutes on a new computer!
Hoster allows you to remove it from one computer, such as your backup computer, and install it on a new computer; immediately or later.
IMPORTANT! Your computer must be on-line or removing Hoster will NOT allow re-installing on another computer.
If you bought Hoster or Hoster Quad or Hoster Lite Duo, you can install a copy on a second computer
(Quad on up to 4). To do this:
Basically find your original installation software, run it and choose the option to uninstall.
Roy.