sublime text : open containing folder

Install Open project path by shortcut. Then setup keybindings in your User keymap file

{
  "keys": ["f10"],
  "command": "open_project_folder"
},

{
  "keys": ["ctrl+f10"],
  "command": "open_file_folder"
}

Initiate the key bindings on a open file (f10 to open the directory you have set as the project folder, ctrl+f10 to open the folder of the current file.)

By default the editor has this item in context menu. If you need this feature on tabs you have to create a file with name "Tab Context.sublime-menu" in "\Data\Packages\User\" (if does not exist yet) and add this code:

[
    {
        "caption": "-"
    },
    {
        "command": "open_dir",
        "args": {"dir": "$file_path", "file": "$file_name"},
        "caption": "Open Containing Folder…"
    }
]

Do not forget formatting lines as a JSON file! If you do not need a separator before this menu item you need to delete first block with caption "-"! You can add any other menu in this file. For example:

{
    "command": "copy_path",
    "caption": "Copy File Path"
},

This worked for me: assuming you have opened the file whose enclosing folder you want to open, use the Menu > Project > Add Folder To Project command.

A new window should open with the enclosing folder. Just click 'Open' and you're done!

You can add the line below to your Default (Windows).sublime-keymap:

{ "keys": ["ctrl+alt+e"], "command": "open_dir", 
    "args": {"dir": "$file_path", "file": "$file_name"} }