Can version 1.4.11 be configured to use IDEA?

[Robert J. Hansen]

Is there some particular reason why you send messages in an obfuscated format?

That said: on Windows you can usually find it in %APPDIR%\Roaming\GnuPG, at least for Win 7.  Otherwise, I'd suggest familiarizing yourself with Windows' facilities to search for a file by filename, and search through %APPDIR% looking for gpg.conf.

Also, you really ought consider upgrading.  1.2.2 is really, really old.  Many bugfixes have come and gone since then.