Hi Predrag,
Im having similar issues. I’ve made all of the changes suggested above. I have the option to select my custom sidebar on the post, but when I push it live it always reverts back to theme sidebar. Can you help? We would definitely be interested to upgrading to pro if we can prove out the use case.
Here is an example page: http://home-dev.youvisit.com/insight/hotels-and-resorts/hilton-waikiki-uses-vr-to-stand-out-from-competition/
Look forward to hearing from you.