diff --git a/src/main.rs b/src/main.rs
index 38c2722..1cbe1ac 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -88,9 +88,10 @@ impl AltairEmulator {
                     );
                     ui.close_menu();
                 }
-                if ui.button("Load binary file").clicked() {
+                if ui.add_enabled(!self.windows.contains_key("load_bin"), Button::new("Load binary file")).clicked() {
                     self.windows
-                        .insert("load_bin_window", Box::new(LoadBinWindow::new(ui.ctx())));
+                        .insert("load_bin", Box::new(LoadBinWindow::new(ui.ctx())));
+                    ui.close_menu();
                 }
             });
         });