Windows explorer is not automatically restarted after seadrive installation


we are trying to distribute Seadrive 3.0.6 to our users via SCCM.
In some cases during testing, the installation finished with the explorer being closed and the user sitting in front of a black monitor.
We tried to start explorer.exe at the end of the installation/deinstallation process, but that just opens another “folder-explorer” windows and the taskbar e.g. stays closed.

Does any of you had similar problems and found a solution?
Thanks in advance!