When I tried to update my KORD scenery, I got a message to uninstall ver. 1.x via the control panel. My problem, though installed and activated, ORD does not show in the control panel.
Are you saying the *old* version doesn't show on "Add/Remove" section of the Windows Control, so you don't know how to remove it ? This happens if you mistakenly removed some files manually (maybe long ago), so the uninstaller doesn't display.
In this case, manually remove it from the Scenery Library FIRST, THEN remove the fsdreamteam\Ohare folder from the FS9 folder, THEN install the 2.0 version.