Installing F-Secure anti-virus on Mac: Incompatible software detected

I have just migrated to a new mac using migration assistant and F-secure AV showed the warning that it could not connect to security cloud.
To attempt to clear this error I uninstalled and reinstalled F-Secure AV.
Uninstallation worked fine, but installation pops a dialog "Incompatible software detected\n\nF-Secure Anit-Virus is incompatible with ESES, spol, s.r.o. anti-malware[...]" and I press ok and the installer exits.
I don't run any of the mentioned AV competitors and F-secure was working fine (albeit, without access to security cloud) before I uninstalled it.
How can I diagnose what is wrong?
OS version is 10.14.6 = latest Mojave with no outstanding updates.
Comments
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Argh, never mind. I found remnants of a years-old old ESET installation and removed it:
[sudo bash]
bash-3.2# rm -rf /Library/Application\ Support/ESET
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