I gather that you store all user choices into:
That is not the standard Mac way of storing passwords.
On OS X, all passwords end up in the keychain.
Imagine I migrate to a new computer, then I will probably forget
to take that "sip-communicator.properties" file with me. All chat
Passwords ... gone.
But I will definitely export my keychain files.
Please consider to start to use the keychain.
Thanks a lot!