At the present time TablEdit does not support Alternate String Hammer Ons and Pull Offs.
Up till now I have indicated such notes as down strokes.
Having recently read L.W. Konigsberg’s webpage on TablEdit I agree with what he has to say and in future all the tabs posted by me will have the following indication Triangle = AltStr PullOff, HammerOn or Down Stroke, leaving you free to apply the left hand fingering you think most suitable for the tune and your experience.