I've been using Fireshot for many years now exclusively on the windows platform. But due to the changes MS has made with their current Ver. 10 release, I abandoned this platform and moved to the Unix-Mac platform. as a Screenshot Pro user from Windows, I've had to absorb a seriously neutered (reduced functionality, non pro, very lite shadow of its former self) OUCH! This really hurts! Especially now that I've discovered that Intel based Unix-Mac computers absolutely blows away ANY windows based computer! There's just no comparison! With 25 years on the windows platform! (Engineering & software development).
Screenshot developers: PORT your fantastic Screenshot & Pro application to the Mac-Unix platform before you loose access to it. It won't be long before another entrepreneur provides a very competitive (design wise) alternative for your windows only version.