Hello Pierre,
In a typical upgrade scenario, we do the steps mentioned below. (which basically starts with a fresh install)
https://communities.netapp.com/thread/26020
In your case, if you are to keep the same versions in the new scServer, you should be able to just copy paste the installation folder from source to destination to carry over the configs/schedules/logs.
Just ensure that the snapcreator services are stopped in the source while taking a copy of the installation location.
(typically like below)
C:\Program Files\NetApp\NetApp_Snap_Creator_Framework\scServer3.6p1
Please let me know if you run into any issues.
Thanks,
Siva Ramanathan