McEnroe performs alongside wife Patty Smyth
Track is believed to date back to 1993 or 1994
The alternate take is thought to date back to 1991
Local TV host urged the city of Seattle to release photos he said would show Nirvana frontman was murdered
Maggie Poukkula, 19, is the daughter of a former Cobain bandmate and school friend
The film will be released on DVD and in selected cinemas during Autumn 2015
'Nirvana' was originally released in 2002
'Cobain: Montage Of Heck' was released in May, featuring unseen footage of the late Nirvana frontman
Over 200 hours worth of recordings were discovered while researching the Nirvana frontman documentary
Current tenant says there 'hasn’t been much interest' in the late Nirvana singer’s home