@Batavus
Firstly, Simply change the location via settings immediately after installing.
Secondly. If you are installing as an update rather than on a dfferent PC then, as long as you have not uninstalled first, the program will retain your old settings including the location of your models folder(s).
Thirdly. If you change the models location the program will give you the option of it moving the files for you or you can do it yourself later using a file manager. If instead of changing the folder's location you add a second folder you can move the files between the two folders freely at any time you want.