I had Numbers documents on my iMac.
They have now disappeared.
The Numbers docs were originally formed on Numbers '09 which I changed to Numbers '13 after being prompted when the new IOS7 was downloaded.
The only thing that I have done that, maybe caused this problem, is that I removed the Numbers app from my iPhone and iPod. I did this because I found that I only needed to use Numbers on my iMac and iPad.
Any and all help would be greatly appreciated.
iMac (27-inch Mid 2011), Mac OS X (10.6.8)