I added the JRE 7 Runtime to the Eclipse -> Preferences -> Java -> Installed JREs and changed the compile version from 1.4 (the default) to 1.7. After doing so and rebuilding everything, I now have more error messages (a typical one is below). I have sent a screenshot of the build path because it still seems like there I something I have to add so it has all of the KNIME libraries, but I am not sure what or how many need to be included.