I struggled with the problems for several days. I had installed the F-Secure directy from F-Secure.fi in 2012. My Internet connection provider sells the same program under it's own brand, so I installed it, after which the problems appeared. Finally I found the reason: F-secure was installed in 2012 in the folder "F-secure" in my Mac's Library section. The internet provider's F-secure files were installed in the Mac's Application section. After removing the files from the Library section the problem was solved.
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