My advice ?
Get rid of it at once - send it back to USA and get a refund.
I had one for 18 months - well in truth I had 3 separate units that all went u/s on me - evwntually I demanded my money back and bought a Lowrance 2000c (which was also £500 cheaper!!).
Best decision I made.
Avmap customer support is total $hite - based in Italy - they just ignore any customer requests.
Database is very suspect - spot height readouts for peaks in Scotland are up to 1000ft out (sometimes more).
I use it for flying around in a floatplane and handily, the lochs/lakes that are less than 1000m are not on it - which is my usual cutoff for comnfortable operations
Sorry if this is a downer, but I would not recommend them at all - not worth the effort.