Hello,
thanks for the description. But that's exactly what didn't work for me. I first tried to install the 3dcpacks. The loading bar appears. Shortly before completion, however, 3DCoat crashes and nothing was installed.
Regardless of whether it was smart materials or brushes. Then I exported my materials etc. as an extension myself in order to reinstall them in 2021. Didn't work either. The migration assistant did not work either and simply copying it over from the document folder only worked with the Smart Materials.
Only my previous description worked for the brushes. I've been using 3dcoat for a long time. And never had any problems so far. Only now with the update to 2021.