You need to UPDATE the FAQ for Comodo Firewall posted by Toggie https://forums.comodo.com/frequently_asked_questions_faq_for_comodo_firewall/how_do_i_backup_my_cfp_settings-t9524.0.html
The one there is for v2.4 and from what I have seen it will not work for v3.xx.xx.xxx.
Thank you for reading this poster,