> Maybe some of you, more experienced developers and shareware authors could
> give some help with this.
If I recall correctly, ideas cannot be copyrighted but their
expression can be. If they have copied the design of your product
in an obvious way, that can be copyright infringement. The currency
exchange "idea" will not be in and of itself. However, if there
are certain obvious ways to express currency exchange, you're out
of luck and if your presentation was based on a previous (say, physical)
one, ditto.
-- erica
