no GlowPercentage in AdvSmoothButton v1.7.1.0

I installed the last tms smooth control pack (v.
With my IDE, I can't find the new property 'GlowPercentage' in AdvSmoothButton.
I verified in code source : the comment exist "// v1.7.1.0 : New : Property GlowPercentage", but there's no implementation.
I think my pack is correctly installed because i see other news like new events in TadvSmoothCalendar, TadvSmoothPopup etc...
Can you help me please.

It is under AdvSmoothButton.Appearance.GlowPercentage

Thank's for your help.