Incorrect Time to destionation (10X normal)

Hello,

I Have a Navigon 2110 max, updated to 4310 max. The last two years (I only use it, when going on vacation) it is showing incorrect travel time. I am driving from the Netherlands to Austria. This is a drive of around 8-10 hours. The Navigon is showing 150-200 hours. The problem occurs with all driving profiles. I also tried multiple versions of the maps.
Does anybody have any idea how to fix this problem.