I too am having this same issue.
All prerequisite software is installed.
The setup for Orbx Central downloads, but then stops at around 20% install.
I've tried running as an administrator, disabling firewalls and antivirus software, restarting PC to no avail.
Operating system: Windows 10
Simulator: X-Plane 11.41
Screenshot: See attached
Issue: Orbx Central is not installing