Help my project has vanished!

Hi, I had a project stored on my mac for sometime. Last week I recorded onto the previously saved project live instruments. I tried to open the project yesterday, selecting it from recent projects in the cubase open window. The following message was displayed: File …does not exist. Do you want to remove it from the recent files list?

I have searched all over for my project even the recycle bin. Any suggestions on how I can recover my project would be great!

Many thanks