Is there a way to edit the context menu on a Strata 3d pdf? I want to remove the 'About Strata' entry.
Yes, you can do that. In Live 3D PDF go to Edit > Advanced > Runtime Java Script.
Find this line:
runtime.addCustomMenuItem("About Strata...","About Strata...","default",false);
and comment that line out by adding // to the start of the line. This should remove the "About Strata" entry from the context menu.