.
jre\bin\javaw.exe 
-mx128m -Dj3d.rend=d3d -jar SlimPlotter.jar

.
javaw.exe 
-mx128m -Dj3d.rend=d3d -jar SlimPlotter.jar

Use javaw, not bin/jre/javaw (no JRE packaged with Slim Plotter).
Use javaw, not bin/jre/javaw (no JRE packaged with Slim Plotter).

