missing preliminary save before download

js/pgm_construction.js

@@ -205,6 +205,7 @@ document.getElementById('pgm-load-local').addEventListener(
 
 /* save all data using filesaver.js */
 function blob_download() {
+  local_save() ;
   var blob = new Blob(
     [JSON.stringify(localStorage)],
     {type : 'application/json'}