The ‘Product Information’ screen on all 2090S devices will identify itself as a ‘2000S’.  The two devices are identical from a hardware/software standpoint.  (2090S are exclusive RadioShack SKUs that ship with a 2-year FreshMap activation code).

Also, the Fresh application will show both devices to be labeled “2000S”, under the ‘My system’ section, at the heading ‘My NAVIGON device.’  Your 2090S is genetically identical to the 2000S.