I could solve the issue with the to strong loaded expressions. Indeed you must set the multiplyfactor value from 0,3 to 0,15 in the configuration file of the G3 Updater before you update the G3M figure. Then the loaded expressions are not disproportionately strong anymore, I don't now if 0,15 is the perfect value but it looks much better for me.

But why the shoe bends disproportionately strong at the toes I could not solve. Does anybody also has this issue or a solution for this? All other cloth parts are working correctly, exept the toes part of the shoe bends disproportionately strong