Theme is very badly designed and portfolio custom post type lacks functionality. KingComposer integration is very minimal and badly implemented. Support answers are VERY slow and not helpful, also supporter seems to be barely able to write in english. Basically support does not give useful answers but tries to get rid of you. Not recommended, better take your money elsewhere.
Addition as of the author's answer: It is untrue that answers come within a day. Within a day comes a mail "we will answer you". Theme errors are simply dismissed instead of addressed. Coding is bad and you will need have have the knowledge to work around the bugs (see other reviews, this is not only me). Simple help inquiries to extend the functionality are dismissed and you get the impression the author does not care at all about the people that gave him their money and despite the fact I bought extended support. The arrogant answer given here is proof for that. I can only emphazise again: Do not buy from this author!