Can't uninstall Minimserver

[Nothung]

I have been running Minimserver very happily for a few years on my Synology NAS with Minimwatch controlling it from my iMac, which sadly has stopped working and can't be repaired.
I decided to install Minimwatch on a new Windows 10 PC. I installed Java and then due to not paying attention I downloaded and installed Minimserver rather than Minimwatch and now I can't uninstall Minimserver because it is 'running' although I can't see it and I can't find a way to exit it.
Subsequently I have installed Minimwatch and it is working fine with the Minimserver on my NAS.
Question: how can I uninstall the unnecessary and confusing version of Minimserver on my Windows PC?
Many Thanks