Downloading older version

[jazzhound]

The question still stands …
sounds like both of us can only upgrade to Snow Leopard, meaning the highest version of iReal Pro we can install is 6.0.1, so where can we find it to download?
In my case I have been using it without problem until now, yet my earliest available Time Machine backup from January of this year still says "iReal b is damaged and can't be opened. Delete 'iReal b' and download it again from the App Store."
The App Store only has the latest version, which won't run on Snow Leopard …
I'm attempting to delete iReal Pro by dragging the icon to the Trash and then emptying the Trash—is this correct? Or is there another way? I don't see any kind of de-installer thingy …