Windows application configuration information is stored in the Registry (if, I believe, it has been properly installed according to Microsoft installation conventions). I am no Windows, guru, but I do believe that this information mostly resides in:
HKEY_LOCAL_MACHINE->SOFTWARE
HKEY_CURRENT_USER->SOFTWARE

You might try taking a look at Win32API::Registry and Tie::Registry
Both of these modules are designed for manipulating/querying the Windows Registry.

hope this helps,
davidj