Wade,
On an iFly device, the IFR data would be retained on the device storage, just not updated. This is because it is an industry portable GPS standard and a sizeable hardware investment has been made from iFly GPS.
However on the App, licensing is based on current subscription, VFR or IFR. Basically, if you do not renew your subscription, the app goes into 5-Minute evaluation mode. If you downgrade your subscription from IFR to VFR, the IFR data goes away.
I hope this help clear up any confusion.