With the exception of the first firmware 1.1 in June of 15, the last three have kept all my settings and custom settings on my Eon Steel. In DM5 however I did have to change units from metric back to imperial, not a big deal. One thing that was different this time though, when I launched DM5 to download some dives off my Eon Steel it prompted me to download the new version of DM5, I clicked the ask me later box. When reopened DM5 later I could not get the prompt to download the new version so I could then download the firmware. I ended up going to Suuntos website and downloading it.
I have Multiple Dive Settings Modes with Multiple Screens. Nitrox CCR, Trimix CCR, Nitrox, Air, et cetera.