In order to successfully use K2dGrFlow, you need KDE 2.1.1. Meschach lib is required. Put it in /usr/lib as libmeschach.a, the make does not do that itself. You also need the EasyMesh program in the director where you install K2dGrFlow. Don't know how much memory K2dGrFlow needs. This may vary depending on your platform and configuration.
You can find a list of changes at http://cage.rug.ac.be/~bm/k2dgrflow/k2dgrflow.html.