Index: applications/editors/josm/plugins/ext_tools/src/ext_tools/preferences/EditToolDialog.java
===================================================================
--- applications/editors/josm/plugins/ext_tools/src/ext_tools/preferences/EditToolDialog.java	(revision 35458)
+++ applications/editors/josm/plugins/ext_tools/src/ext_tools/preferences/EditToolDialog.java	(revision 35499)
@@ -48,5 +48,5 @@
                 true);
         contentInsets = new Insets(15, 15, 5, 15);
-        setButtonIcons("ok.png", "cancel.png");
+        setButtonIcons("ok", "cancel");
 
         this.tool = tool;