C-MAP Genesis Subscription / Layered Maps

Hey - quick question that I cannot seem to find an answer to here or on the C-Maps site.  If you subscribe to Genesis, and download a composition map, is it only usable while you have an active subscription, or once you have it you have it and are good to go from then on?  I get you would not be able to update your own maps, etc. and they have the free Social Map.  I just cannot figure out if you can only use the composition maps with an active subscription (IE if I do a month only, then head to the lake 5 weeks later - it's unusable) or if once you have them downloaded you can use them forever.

Anyone know?

Thanks!