DM4 vs DM3

I own a Suunto Vyper wristwatch-style dive computer. It's a fine little computer except for one thing: Suunto went and crippled the software for it -- seemingly to force divers into using their "movescount" social-network site. For me the most irritating thing is that it won't export DL7 files which I can then upload to Scuba Earth or DAN or whomever.

Here I am thrashing around in the pool trying to get used to a dry suit.

But there are places you can grab a copy of version 3 of the software. It ain't as pretty as version 4 but it'll export pretty much whatever you want.