PMS in "repair mode" --> cannot stop/reinstall

Hi,

the PMS service is not running since two weeks. The package center shows "is being repaired" (in German: "wird repariert"), but the status has not been changed since two weeks. In this status I am not able to reinstall PMS. The reason for this problem could be an power failure exactly two weeks ago. The log files do not show any special error information. Last entries are from the time after the power failure.

How can I stop the process to reinstall the application?

1. Version of Plex: 1.10.0.4523-648bc61d4
2. Version of DSM: 6.1.4-15217 Update 5
3. NAS Model: DS416

Thanks for your help!

Regards,
Frank