Install the Personal edition on a single PC. The data can be moved at a later date to a Multi-user system. Use this for initial trials or where your data will not be stored on a separate server. The Personal installation installs to default locations and there is little control at the time of installation with regard to installation preferences.
Install the MUC on a system where the data may be accessed my more than one user.
Install the MUS system only if you have been given a network licence in advance of your installation. For use on cloud or terminal servers