SSOTS still needed on QNAP 4.2.6 and QLogitechMediaServer v2.2.1 (=LMS 8.3.0) ??

QNAP TS-509P 4.2.6
QNAP Club QLogitechMediaServer v2.2.1 (contains LMS 8.3.0)

I just upgraded my QNAP setup from ancient v2.1.1, and LMS from v7.5.x

In the Previous setup the SSOTS management interface for the LMS was used for start/stop/monitoring.

I do not now see SSOTS in the App center.

Is SSOTS still useful or relevant for the QNAP Club version of LMS for QNAP ?
If so, where can it be found

Thanks