I have a 2100 series, the 2110 ( NOT MAX ) with WesternEurope_NT2008 cards on. I don't use it to much but it is time to get it updated to the last possible version.
On Navigon Fresh I see that this should be release Q3 2011.
It's Q4 2011 northern/southern/eastern Europe (western will be either north or south, depending on whether you prefer to have the UK or Spain in the pack).
What you should do is keep what you have on your card, replace maps and Reality view in their corresponding folder.
However, keep the content of your "MN6" folder, the one included in this download doesn't work (didn't work with mine).
To get updated POI, you need to replace the MN6/poi/poiwarner/poiwarner.ovm file in addition to the maps. That'll leave you with a very much up to date device, albeit still quite slow compared to more modern stuff.