AppleScript to open current Finder directory in Atom editor

OpenAtomHere

(* 
 * Finder Open Atom Here - v1.0 - 6/12/2014
 * http://shauvik.com/
 * 
 * Copyright (c) 2014 Shauvik Roy Choudhary
 * Dual licensed under the MIT and GPL licenses.
 * Based on Open iTerm Here script by Ben Alman
 *)

tell application "Finder"
	set mySelected to get selection as list
	if (count of mySelected) is not 0 then
		set myItem to first item of mySelected
		if class of myItem is alias file then
			set myItem to original item of myItem
		end if
		if class of myItem is in {file, document file, internet location file} then
			set myItem to container of myItem
		end if
	else if the (count of window) is not 0 then
		set myItem to folder of the front window
	else
		set myItem to path to desktop folder
	end if
	my open_Atom(myItem)
end tell

on open_Atom(myItem)
	set myPath to POSIX path of (myItem as string)
	tell application "Atom"
		open myPath
	end tell
end open_Atom

When I try running this, I get an error message

`OpenAtomHere:846:862: execution error: Atom Helper got an error: Application isn’t running. (-600)`

I tried the solutions I could find, but couldn't get this to work:

• http://stackoverflow.com/q/24196536
• http://stackoverflow.com/q/19957268