Blender addon enable checkbox update

Using-Blendercam-from-github.md

@@ -38,7 +38,7 @@ The easiest way to install is not to install but tell Blender where to find the
   * **1** - select **User Preference** panel
   * **2** - select **Add-ons** tab
   * **3** - select **Scene** category
-  * **4** - enable the CAM addon by left click on the check box
+  * **4** - enable the CAM addon by left click on the check box. Note: for daily builds of Blender after 11 Jan 2016 the checkbox is on the left side.
   * **4a** - the file path should match your Blendercam git path
   * **5** - Optional: you can enable the experimental features
   * **6** - select **Save User Settings**