Hello, about Camtasia Studio (which is a very good program) I belive that a very important tool is missing. It would be a Gamma color correction. Sometimes the camcorder can get a bit confused between light and shadow and this is when Gamma correction comes handy! - Many Thanks!
ScreenFlow on Mac has this, so there is no excuse for Camtasia not having it. It should be an adjustable setting at the global / canvas level, and maybe at the video level as well (they already have a few Color Adjustment and Colorize, go Gamma seems very doable).