There is a bug in the graph scaling. When I chose scale <1 the program crashes. I'm sure it is due to the string to double conversion, which is not marked as CultureInvariant. Yani please remember that some locales use ',' instead of '.' as a decimal separator (they also use ';' as a column separator in CSV).
Another issue is the graph coloring - some colors are barely visible on the graph (and they always are those which I'm most interested in observing them). Light pink is a good example... It would be great if I could choose custom color for a selected trace.