How to use nconvert

[Sally]

Hi, I'm using a Intel Macintosh, my nconvert program is found in this path:
/Applications/NConvert/nconvert
My question is if I have a file in that same folder named "0012.pi2 (it is in pi2 format) and I want to change it to a jpeg using the same name, I cannot figure out how to type in the path. I see in the nconvert commands "-in", "%", and -out" and "jpeg" but I don't know the proper syntax. Also, if I want to batch convert and entire folder, what would the syntax be for that? It doesn't recognize what I enter and I probably have a space wrong or a hyphen, or whatever.

Thank you so much and Merci Beaucoup,
Sally Welch

[xnview]

Something link nconvert -o jpeg -out % *.pi2