Installing on Windows 64 bit

AppxODBC is a 32 bit product. The Windows ODBC System DSN it creates is 32 bit not 64 bit. To view and manage 32 bit DSNs on a 64 bit version of Windows, you must specify the 32 bit version of odbcad32.exe. For 64 bit Windows, to manage 32 bit DSNs like AppxODBC, use \Windows\SysWOW64\odbcad32.exe and not the 64 bit version with the same name found at \Windows\system32\odbcad32.exe.

If you are working on a 32 bit version, this does not apply to you, just run the odbcad32.exe found in your Administrative tools (which is mapped to \Windows\system32\odbcad32.exe.)