#9: Simulation not possible after changing model

plugins/org.yakindu.sct.simulation.ui/src/org/yakindu/sct/simulation/ui/editor/HighlightingExecutionListener.java

@@ -84,6 +84,7 @@ public class HighlightingExecutionListener extends
 					break;
 				case TERMINATED:
 					getSupport().releaseEditor();
+					highlightingSupport = null;
 					break;
 				}
 			}