Maintaining server on ASUSTOR NAS

I go to the ASUSTOR NAS’s App Central and try to update UrBackup server. The latest version I am stuck with is 2.3.7.0.r1 (last modified 29.03.2019 01:26). Do you still maintain the server application for ASUSTOR NAS? Do I need a new hardware to update?

My system information is

Model: AS1004T v2
Processor: ARMv7 Processor rev 1 (v7l)
ADM version: 4.0.7.RVG1
BIOS version: 1.10