Thanks for your replies.
I found a workaround for MAC.
Using Multibit I export the private key. Then open that exported file using Textedit.app and editing it with the new address.
Then importing that private key file back into Multibit.
Seems to be working.
BTW if some smart programmers and some excellent GUI people got together and made all the moving parts to using Bitcoin click simple (and mobile) it would likely be the single largest lever we have to getting mainstream adoption.
....add to that some viral tools built right into the software, recruiting the new users social network friends we could make this explode.
It took me a day just to learn how the system worked, how to secure everything, and how to use the system.
All the resources are written by techies... with the assumption that everyone else understands the techie stuff.
Most mainstream won't go through that. I needs to be click simple for the masses. And because of the elegant design of Bitcoin I can't see why the tools to use it can't be click simple.
Wish I was a techie...Perhaps when I get some more $$$ aside I'll recruit the right techies and make "Bitcoin Click Simple" a passion project for humanities sake