Error with Karamba Installation in RH7

I am trying to use Karamba3D in both RH6 and RH7 (some models open in one or the other). But I can’t seem to download the RH7 installation file. When I click the installation on on the homepage I get the following error.

If I try Grasshopper through a RH7 window, I get the following error when trying to use Karamba components

I think this is because the license says it is for RH7. See the screenshot below when I open a RH7 file:

Is there any way to have both RH6 and RH7 working versions of Karamba. I have two licenses purchased as well if that matters.