Your Navicore license (like mine) was perpetual, but when they were transferred to Wayfinder they changed to have an expiry. As with most proprietary software, you signaled acceptance of the new license terms by continuing to breathe.
They can (probably) get away with this due to the fact that the Wayfinder software is not the Navicore software and that therefore different license terms can be applied.

Regardless, if your maps application says 'Wayfinder' then it will expire, probably sometime this year. If you still have a valid license it shows you the expiration date somewhere on the about screen. I suggest you check that so you can get prepared and not left in the lurch like me.