Navionics is a map company recently purchased by Garmin. It works with a lot of different sonar mfg, except Garmin at the present time.
Lakemaster is a different map company that was purchased by Johnson Outdoors. They own Humminbird, Minnkota, Canon.
It only works with Humminbird sonar/GPS units.
You can renew the Freshest Data subscription and update the card. If the card is 8GB, you have to request the current size 16GB to have enough memory to do an update. The subscription is $99.
If you want all the current features that work with Lowrance units, you need the current card version, not the one you have.
MSRP of a Hotmaps Platinum regional card is $199.