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I have noticed a huge improvement in fine tuning the sensitivity. Maybe other guys are not as picky about the size of the return their bait is making. Also nice that I can finally mark in the 3 feet of water right below the ice.
if you don't have the file that's in your unit, i have it if you want a copy. that way you can try the new version and go back if you don't care for it.from what i read here about the same thing, every one likes the tweaks on the return gain. that's what it was about.if you want a copy of the old firmware pm me your email and i'll shoot you a copy of it.there is nothing to be afraid about tho.some have done a partial update or not knowing it didn't get done correctly. this sounds like a software issue because they didn't add crc checking into the software to check the bin before installing it and after it's supposed to be complete. so a few have had to reflash the bin. if you use a download manager to insure your file is complete, you will be fine.they spend a lot of money on these updates for us.
Update seemed useless, so I didn't bother with it.