To make FS9 starting again, just rename modules\bglman.dll to something else, like bglman.old. Your FS9 will work as before, but of course you wouldn't be able to try or buy Zurich until this issue will be solved.
The uninstaller will not remove it automatically, because the same module is needed by many other products, like EHAM, KLAX, KDCA, the Phantom, etc so, by removing it, all those will stop working. It would be like removing FSUIPC in the uninstaller of an airplane, and killing hundreds of other products as well.
We are investigating: I just re-downloaded the installer again from the site, to exclude a corrupted file, ran the installer and it's running fine on FS9+XP without any problems. I guess it must be another module in conflict.