Paros 3.0 requirements

["Jeff Sani" <jeffs () motivus com>]

Sorry for the newbie post, but what is required on the client side to
run this app on XP?  I have installed the JRE and the win version of
Paros, but it is asking me to select an app to use for .jar files?  Is
there another app I need to install?

Thanks,

Jeff