Plug in your GPS unit and copy the file over to your formatted card. when this is done copying unplug your unit from the computer and turn it off. when it shuts off turn it back on and let it run its course. this will take abou 5 minutes to load onto your unit. You will have to put your card into a reader or some other kind of unit to format it again so that your unit doesn't kepp trying to load the update on the unit.
Check your Navigation Setting...
Settings>Navigation>Destination Reached>Off. Remember if it shows Off when you get to the final step, don't touch the screen.
If it shows On your GPSr will stop navigating at about 40 ft.
Also, don't expect your GPSr to get you to GZ (Ground Zero), consider 10 feet as a good outcome. It is nice when you see 0-7 feet, but in fact, you may be 10-20 ft away.
As for the upgrade question---I don't use a USB Cable, so I have to refer to the instructions on the Lowrance website, as you probably did. So....let's assume that neither one of us has read the instructions. I will take away all non-essential words from the instructions.
1. Click on the Endura 1.5.1 update link.
2. I save the software update to my desktop. Then I unzip the file by right clicking and selecting "extract" and saving it to my desktop.
3. Do not turn on your Out&Back until after you insert the MicroSD card into the card slot. Make sure it is all the way in. (I always use a blank card). DO NOT TURN ON YOUR UNIT YET.
Connect your O&B to your pc using the USB cable. Your O&B will power on and your PC will recognize the MicroSD card.
4. Select and copy the extracted .exe file to your SD Card.
5. Unplug the USB cable and make sure the O&B is off. Do not remove the SD Card.
6. Reconnect your USB cable. Your O&B should power on and the update will automatically begin installing. Follow the prompts. (I have installed many software updates to my 6 Enduras, sometimes I got prompts and other times I didn't.) It should not take long.
7. Once it is complete the screen should say "Press any key to continue"
8. Disconnect the USB Cable and remove the SD Card. Restart the unit. It will reboot.
I know that these are pretty elementary instructions, but I have found that taking out extraneous verbiage is helpful.
If the download is successful, it will load and you will see the Language Selection Screen.
Now you can check to see that your O&B has version 1.5.95881 (which is actually 1.5.1) Power on and hold down the Menu Button.
If there is anything in these steps that you don't understand, or aren't working for you please let me know.
Once I hear from Groundspeak regarding the 30 day trial Premium Membership coupons I will PM you with a Promo Access code.
Lowrance Pro Staffer, just trying to get the facts on Endura straight