Silhouette Paint - why is my Paint Source greyed out?

Using the Clone Tool. I’d like to Clone Recursively…I believe to do that in Silhouette I need to set the Paint Source to Output, yes? But my Paint Source is greyed out…How do I clone recursively in Silhouette Paint? Thanks!

You’re right, you have to select “Output” as Source in the Clone tool menu. Can’t figure out why yours is greyed out, it works normally here.