How to mount S3 drive only for a single user of the computer not all Windows users of that computer
Try installing the software in user mode.
For that you need to perform clean reinstall:
1) Uninstall the software via Control Panel.
2) Remove configurations, logs etc. by deleting the respective folder:
"%appdata%\..\local\CloudBerryLab\CloudBerry Drive\"
"%programdata%\CloudBerryLab\CloudBerry Drive\"
3) After that install the software and select "user mode" instead of common.
Upon installation you should have settings files placed in a user folder and only that Windows account will have access to the mapped drives.
Granular permissions and Windows ACL support are on the way.