This folder is here because we don't want to break old version GPlately. The file Muller_etal_2022_SE_1Ga_Opt.zip in this folder is a symbolic link which points to the actural file at https://www.earthbyte.org/webdav/ftp/Data_Collections/Muller_etal_2022_SE/Muller_etal_2022_SE_1Ga_Opt_PlateMotionModel_v1.1.zip. After some time, when nobody is using the old version GPlately, this folder should be deleted.