Index: trunk/src/org/openstreetmap/josm/actions/RestartAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/RestartAction.java	(revision 6110)
+++ trunk/src/org/openstreetmap/josm/actions/RestartAction.java	(revision 6111)
@@ -94,4 +94,9 @@
                 cmd.add(mainCommand[0]);
             }
+            // if it's webstart add JNLP file
+            String jnlp = System.getProperty("jnlp.application.href");
+            if (jnlp != null) {
+                cmd.add(jnlp);
+            }
             // finally add program arguments
             cmd.addAll(Arrays.asList(Main.commandLineArgs));