If you have two updates on one card .. The new and the older update -- when you power on the unit the unit will see the downgraded software and then ask you if you want to replace your new software with the old software... if you downgrade it the next time it comes on its going to ask you to upgrade it again because the unit is only looking for a different .bin (software) file. The unit will ask every time you power it on with card in it or, will prompt you when you insert the card that has a software file on it, into a unit that is already powered up.
Thank you,
Deborah @ Humminbird


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