You can save yourself a step and power the unit in the house on a 12v power converter ...
https://www.walmart.com/ip/Coleman-T...BKC_4sEJ9cwylI

Boot the unit is Simulator and mark waypoints directly on the maps in the Chart view on the HB unit ...

No need for transferring anything that way because the waypoints will already be in the unit memory ... Plus - it's more practice for using the HB unit ...
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I don't think Navionics even makes the Nav Planner PC software any more ...

Rickie