Ahh, that's the 32 bit ODBC manager. Basically, on a 64 bit machine, you can have 64 bit and 32 bit ODBC drivers installed. The normal place to look for the drivers is in the 32 bit version, but the actual ODBC applet that runs is the 64 bit one. This is why I have a shortcut to odbcad32 on my desktop.
*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington