I usually upgrade Toast every other version. I really don't see anything compelling me to upgrade from 11 to 12 . I don't need all the extra software, which is all the Pro version is, comes with a bunch of extra software (theres some decent things in there)
Unless 11 suddenly stops working when 10.10 is released,then I guess I'll upgrade.
Problem is there's little left to add to a burning application, about all they can do is maintain it and value add other software. I'd hate to see them stop producing toast, but it's hard to justify 60 bucks for an upgrade that adds nothing to my day to day usage.