Index: applications/editors/josm/plugins/tracer2/src/org/openstreetmap/josm/plugins/tracer2/preferences/ServerParamDialog.java
===================================================================
--- applications/editors/josm/plugins/tracer2/src/org/openstreetmap/josm/plugins/tracer2/preferences/ServerParamDialog.java	(revision 34976)
+++ applications/editors/josm/plugins/tracer2/src/org/openstreetmap/josm/plugins/tracer2/preferences/ServerParamDialog.java	(revision 35499)
@@ -121,5 +121,5 @@
 
         contentInsets = new Insets(15, 15, 5, 15);
-        setButtonIcons(new String[] {"ok.png", "cancel.png"});
+        setButtonIcons(new String[] {"ok", "cancel"});
 
         m_oTileSize = new JComboBox<>(m_astrTileSize);