Quick Profile Transition Tool

This is probably a very simple question.

I use the quick profile transition tool a lot but once an arc becomes part of a complex element I can't then use it on that arc. I typically use the tool before complexing but what is the best way around this if I don't as I don't want to drop the complex. The only thing I can think of is the reverse profile transition but this isn't as clean or simple a solution as if I would have used the quick tool before complexing.