my keynote presentation file disappeared from hard drive ?

Hello,

Something very mysterious happened to me yesterday.

I've been working on a keynote presentation for a week.

I precise that it was my first professional work on my brand new

I7 Imac on Maverick, I am used to Snow leopard on a MacBook Pro

I've been working on for 7 years. I'm very new to Keynote (it's the 6.1 version)

and Maverick, but very familiar with OSX.

Yesterday, I imported many different files to my presentation by mistake,

it crashed keynote. Then, I cleaned up the folder containing all those

imported files, deleting some of them. I restarted Keynote, and there was nothing

in the "open recent" menu.

Impossible to find my .key file anywhere on the hard drive !!

Thinking that I maybe trashed it and emptied trash, I used many

data recovery softwares, in vain. My file has just disapeared, I can't believe

it ! The file is still in my "recent items" of Apple menu but impossible to locate

it with "open finder location" option.

In 30 years of using computers, It's my first mystical experience...

Anyone, found a way to recover the mysteriously vanished .key files ?

thanks for your help.