It shouldn't have hurt anything with the unit running out of the water...these xducers don't create the heat that CHIRP xducers are capable of...
You can run the unit in Simulator to learn the unit...
*Power on the unit...
*When the HB splash screen appears...press Menu ...
*Choose Simulator from the options on the popup screen...
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You can build your own AC power supply ....to run the unit in Simulator in the house...
You will need a PC 11 power cord...
http://www.humminbird.com/Products/PC-11/You will need an AC to DC converter with a 12v output minimum of 1amp (1000mA)...
You will need a 3amp fuse in the + wire...
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Register your unit on the HB website and then log in to your account...
The latest version of software will be available in your HB account...
*Download this file to your PC ...(your PC will not open the file...just copy the file to your PC)...
*Copy this file to a blank formatted SD Card ...
*Power on the unit in Normal or Simulator ...
*Restore Factory Defaults under the Setup tab ...
*Insert the SD Card into the card slot ...
*Answer Yes to the green popup window that wants to install the software ...
*Answer No to the Red popup window that asks if you want to Abort the install...
*Do not touch the unit until it says "Update Complete" ...
*Remove SD Card ...
*Restore Factory Defaults" under the Setup tab (again)...
Rickie