Cross DJ Installing In-App Purchase

I purchase Cross DJ and the In-App Purchase of Full Video Output to test on my iMac desktop. Then went to install it on my Laptop Mac Book Pro where I want to use it. It install the Cross DJ fine. As for the In-App Purchase there is no where to restore it or load it back on that I see. Looked all over for instructions. It just says purchase now and I click on it and it wants another $19.99. I don't know if this will charge me again or recognize I have purchased it and just install it. What do I need to do?
Thanks,
David
Thanks,
David