I think you'll find it's just busy.
If you open an old large show (created with an older beta) it can take a while.
If you wait it will get there (go make a up of tea!). If you save it back it
will load much faster next time.
I may hav to improve this to speed things up, I hadn't noiced it took so long
>I have just created another large menu of slide shows and saved to a .xats file of about 64kb's. That also refuses to open, just freezes the program. Looks a bit like the problem I had earlier and you fixed it. Could it by any chance have slipped in again.