May 20, 2011 Patch (Tools)

{{Patch layout
 * game = tools
 * source = http://forums.steampowered.com/forums/showpost.php?p=22522340&postcount=14
 * source-title = Portal 2 Authoring Tools Update Released
 * before = May 17, 2011 Patch (Tools)
 * after = N/A


 * notes =

Portal 2 Authoring Tools

 * Fixed Hammer becoming unresponsive after launching map

}}