Dual boot and activation

I have a desktop and a laptop on which I have Smartftp installed on Windows 7 platform.
On my desktop I have just installed Windows 8 which I can execute using dual boot.
When I tried to activate Smartftp on Windows 8, I got the following message:
License error: License exhausted, cannot allow another instance.
I am certain that there must be a procedure which permits the booting of multiple operating systems on a single computer which have the same computer name and Smartftp preceives it as only one activation.

Click on the "Get Help" link in the activation dialog and follow the instructions.

The "Get Help" link did not address how to handle dual boot installations.
On a dual boot machine, Smartftp can only be used serially and not simultaneously and should be considered as only one activation.