I have had the F-secure Freedom installed on my Mac Mini for several years. Today it refused to start. I uninstalled it using the Mackeeper.app and installed it again. The installation ended with "Could not configure the app. Restart Freedom and try again." I restarted, to no avail. I uninstalled the app, shut down the computer, started it anew and installed the Freedom, with the same result.
Mac OS Mojave 10.14.3. The problem started actually after my Mac Mini had been updated to this OS version. I uninstalled the Freedeom using the MacKeeper smart uninstaller, shut down the computer and started it again. I tried to reinstall the Freedom with the same result.