Check carefully what the installer/updater tells you exactly.
First you can install/update ArchiCAD, then in the next step you can install/update the BIM Server (you will have to say yes to this step), then you have achoice to install a standalone BIM Server Manager application (this is not needed on the BIM Server machine - it is usually needed on a machine that does not have the BIM Server installed, but from which you we to be able to administer the BIM Server).
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AMD Ryzen 1700X CPU, 48 GB RAM, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), WIN10 PRO ENG, AC20-AC26
Loving Archicad since 1995