short grub,
Sorry to hear that you lost all of your waypoints but the guys here are right: you should not have lost them updating the software on your Humminbird unit. They are also right in that you should always back them up (and multiple copies is a good idea).

I am perplexed though in how you have screen snapshots though. Did you have a second memory card in your unit when you loaded the software update or did you use the same memory card that the screen snapshots are on?