The v220.127.116.11 service is running.
I went to install v18.104.22.168 and get an unhelpful error message from the installer.
The installation log is attached to this issue.
I will also include a screenshot, and will also confirm if stopping the service first allows this installation to proceed.
UNIFY Event Broker Service v3.0.0 x86.msi
Customer support service by UserEcho