H folks, it now seems to be fine. I had the computer off overnight, not sure if that has anything to do with it working now. At the time clicking on the file did nothing then clicking on the S/Up icon in the dock and clicking open then choosing the file also did nothing.

I tried clicking both files that are on my desktop but neither worked. (I presume, as a newbie, that the file with the tilde(?), that is the S on it's side, after the file name is the backup file??)

If you have any ideas as to what may have caused the disfunction I would be happy to hear them. For what it's worth I'm using a Mac OS X 10.5.8.

Thanks again for your prompt replies.

Hi, I can't open drawing/model just saved to my desktop. I'm using S/Up8 on a Mac. Any help much appreciated.