Retopflow: cant use all instument

I cant use tweak, relax, loop cut\slide instrumets, just cant klick on them. Help please. Version Blender - 2.79, Win8.1., addon from github.
I tryed run it with disabled all another addons, but result still bad.

Did you see this video yet ? Perhaps it will clear some of these questions up.

Its still in beta and is a total re write. It seems they are gradually and very carefully re introducing all the previous features.

It is looking amazing already though and feels like its really going to realize its true potential with version 2

Sorry is this about version 1 ?