[Wlug] newbie question: path

[d.maly@ieee.org]

Should be able to figure this out with a little homework, but can't!

Can't figure out where I define my "default paths."  That is, if I check
the properties of my 'Evolution' icon on my desktop, the Launcher gives
this for the command:  "evolution-2.6"

Presumably, the path for this application is defined in a list of
'default paths.'  How do I change my default paths?

Thanks in advance,
Doug Maly