Can anybody help with the installation step by step in blender 2.81? I downloaded the file and unzipped it in Blender Foundation/Scripts/ Addon. I tried to install first the py file. It doesn't show up in Edit/Preferences/ Add-On. Then I added the whole zipped file to the Scripts/Addon file and tried to install the whole thing using again Edit/Pref/Add-on/Install, no luck. What am I doing wrong? Which file has to be installed and from where? No dots in the file description or anything like it to prevent reading. Please help with the installation process. Thank you in advance.