I can’t uninstall Safetica. After I run uninstall function of the Safetica I get a message that Safetica can’t be uninstalled, because it is currently running.

You have to exit Safetica, before you can uninstall it. Exit all operations in Safetica and choose uninstall either from the fast menu or right-click in the tray menu on the Safetica icon and choose uninstall.