Index: app/src/processing/app/Base.java
===================================================================
--- app/src/processing/app/Base.java	(revision 5693)
+++ app/src/processing/app/Base.java	(working copy)
@@ -815,7 +815,7 @@
    */
   public boolean handleClose(Editor editor) {
     // Check if modified
-    if (!editor.checkModified(false)) {
+    if (!editor.checkModified(editors.size() == 1 ? true : false)) {
       return false;
     }