diff --git a/Main.sublime-menu b/Main.sublime-menu
index 2fecd33..543fe7a 100644
--- a/Main.sublime-menu
+++ b/Main.sublime-menu
@@ -82,6 +82,12 @@
                         "command": "stino_open_in_new_win",
                         "checkbox": true
                     },
+                    {
+                        "caption": "All Source Files",
+                        "id": "stino_open_all_src",
+                        "command": "stino_open_all_src",
+                        "checkbox": true
+                    },
                     {"caption": "-"},
                     {
                         "caption": "New Sketch...",
diff --git a/StinoCommands.py b/StinoCommands.py
index f4c2479..d12e6ae 100644
--- a/StinoCommands.py
+++ b/StinoCommands.py
@@ -278,6 +278,25 @@ def is_checked(self):
         return state
 
 
+class StinoOpenAllSrcCommand(sublime_plugin.WindowCommand):
+    """."""
+
+    def run(self):
+        """."""
+        if stino.arduino_info['init_done']:
+            state = \
+                bool(stino.arduino_info['settings'].get('open_all_src'))
+            stino.arduino_info['settings'].set('open_all_src', not state)
+
+    def is_checked(self):
+        """."""
+        state = False
+        if stino.arduino_info['init_done']:
+            state = \
+                bool(stino.arduino_info['settings'].get('open_all_src'))
+        return state
+
+
 class StinoOpenSketchCommand(sublime_plugin.WindowCommand):
     """Open Sketch."""
 
diff --git a/libs/base_utils/exceptions.py b/libs/base_utils/exceptions.py
new file mode 100644
index 0000000..c58a726
--- /dev/null
+++ b/libs/base_utils/exceptions.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""Doc."""
+
+from __future__ import absolute_import
+from __future__ import print_function
+from __future__ import division
+from __future__ import unicode_literals
+
diff --git a/libs/stino_runtime/__init__.py b/libs/stino_runtime/__init__.py
index 0fc4fc7..806a57d 100644
--- a/libs/stino_runtime/__init__.py
+++ b/libs/stino_runtime/__init__.py
@@ -772,14 +772,16 @@ def open_project(project_path, win):
             has_prj_file = True
             break
 
-    if has_prj_file:
+    is_open_all_src = arduino_info['settings'].get('open_all_src')
+
+    if has_prj_file and not is_open_all_src:
         win.open_file(file_path)
     else:
         paths = glob.glob(project_path + '/*')
         file_paths = [p for p in paths if os.path.isfile(p)]
         for file_path in file_paths:
             ext = os.path.splitext(file_path)[-1]
-            if ext in c_file.INOC_EXTS:
+            if ext in c_file.SRC_EXTS:
                 win.open_file(file_path)
 
 
diff --git a/libs/stino_runtime/st_menu.py b/libs/stino_runtime/st_menu.py
index e3a0700..a0243a2 100644
--- a/libs/stino_runtime/st_menu.py
+++ b/libs/stino_runtime/st_menu.py
@@ -210,6 +210,12 @@ def update_sketchbook_menu(arduino_info):
     text += '\t' * 6 + '"command": "stino_open_in_new_win",\n'
     text += '\t' * 6 + '"checkbox": true\n'
     text += '\t' * 5 + '},\n'
+    text += '\t' * 5 + '{\n'
+    text += '\t' * 6 + '"caption": "All Source Files",\n'
+    text += '\t' * 6 + '"id": "stino_open_all_src",\n'
+    text += '\t' * 6 + '"command": "stino_open_all_src",\n'
+    text += '\t' * 6 + '"checkbox": true\n'
+    text += '\t' * 5 + '},\n'
     text += '\t' * 5 + '{"caption": "-"},'
     text += '\t' * 5 + '{\n'
     text += '\t' * 6 + '"caption": "New Sketch...",\n'