Hi…,
Welcome.
As per FAQ - Previous Navigraph AIRAC Cycles, We only keep the current cycle on the server, and if you have an active subscription, you may download.
It isn’t a matter of inheriting or a right. When you download an AIRAC you can use that from then on. If you delete it say by an uninstall/reinstall of MSFS, that AIRAC data is gone from your computer. If you have a subscription you can download the latest AIRAC cycle.
Cheers
Ian