1.Close all QPS applications completely
2.Copy the files (GEOIDMODELS.xml + AUSGeoid2020_8451.wkt + AUSGeoid2020.BIN) to c:\Program Files (x86)\Common Files\QPS\Geo\Geoid\
3.Copy the file GEOIDMODELS.xml to c:\Users\Public\Documents\QPS\Shared\Geo\Geoid\
4. Start Qinsy Console and Setup/modify the Geodetics