Thank you @eralde . Can I install the firmware from https://osvault.keenetic.net/KN-1511/4.03/ and then go to my router and add needed modules? Or is it only mentioned components in the txt and that is it, no way to add others later?
I create ticket with keenetic.com, but they redirected me to keenetic.ru. The keenetic.ru haven't responded to me yet. That is why I came here.