FIS+ will continue to get upgraded they have added atmospheric pressure to the unit in the 0.1.7 beta that is on the update along with bar mbar and PSI as pressure units so now you have have (if ECU is supported) absolute turbo pressure pressure in the system minus atmospheric. The only reason there has been a slow down in FIS+ releases is because the coder has been working hard to finalise the advanced so they can release it.
and updates will continue, but as with anything if people are spending more time developing something and have more IP (intelectual property) invested in a product then it generally costs more. the advanced isnt just about showing parameters its about emulating higher features in the car such as getting OPS to work on the RNS if you have PDC and reverse mirror positioning so they are very different beasties.
And Polar FIS+ the aluminium was updated 17th August 2011 the aluminium box which is what I think you have.
http://www.auto-polar.com/index-searchmod-15-searchabout-20-load-module_news.php.htmFIS is the black plastic version and it was never up gradable over the internet. And if you have a black plastic one they will take it back and charge a smaller upgrade price to go to a newer unit, which is fair enough, I have done the same to anyone who has spoken to me about upgrading and as a result I have got 4 of the black units sat on a shelf at home so I am £400 out of pocket through helping people out, plus when there were issues with one or two cables I went out and bought new cable new pins from tyco and plugs as I wanted to make a new cable or repair any issues people have had.
If you are not happy with the unit Dave then I am happy to take it back if its in original condition.