I allowed 2.3 and up when I released the app, but it turned out that people would give constantly bad ratings, due to high incompatibility with Gingerbread.
So I "cut" the 2.3 support and began taking advantage of newer versions of android such as the action bar, object animators and so on.
Framework Tool is in a state where the benefits of going back to 2.3 compatibility are so small compared to all the work needed to accomplish that.
Sorry for the bad news!
Also I feel 4.0+ devices are the future its difficult to make the app compatible on lower versions of android. 2.3 and below versions have a different prospect towards framework altogether...