Please if you downloaded this version on the 5/10/2019 download it again and reinstall it.
Version 6.3.0 of MathGraph32 JS fixes the followinf issues :
Minor bugs are fixed.
Correction of a bug that might appear after using the protocol tool : If an object was modified via protocol tool, once the protocol dialog box closed, if you used undo then redo actions, you could get all the points of the figure to be given a name.
Version 6.3.0 of MathGraph32 JS brings the following improvements :
Optimization of the computation of constant calculations.
improvement of macro-constructions when final objects depend on an intermediary calculation or function which is constant.
Download on : this page
Use mathgraph32 on line on : this page.