ABC2Win is pretty much obsolete, and doesn't recognise a lot of the newer ABC standards, such as w: and W: for lyrics. I've stopped using it. You can test abcs at Concertina.net, here:
Most programs that convert from midi to abc seem to make mistakes. They are a good way of learning the basics (I've been using TablEdit's export function, but the results are often inaccurate and need thorough editing) but it's best to work towards doing them by hand. Since Noteworthy, in my limited experience, can't handle an accurate export to midi, I doubt if it does much better with abc.