CurrEx - Currency Exchange for Pilot

CurrEx provides simple currency exchange functionality for the USR Pilot.
The screen has three editable text fields: enter the rate in the first one, the amount of
foreign currency you wish to convert in the second or the amount of your own currency you
wish to convert to foreign in the third. Converted rates are displayed as you write! 

CurrEx is free, but no guarantees are given or implied - I am not responsible for any
decisions you make based on CurrEx's output!

Thanks to those who gave feedback on the last version, many of the suggestions and bug
reports have made it into this release.

Feedback is always welcome,
Iain (isb@pobox.com)