Your site main page signs version 4.8.4, which is not the latest version, it should be 4.9.3. If you re-download from codecanyon, you should get the latest one.
I see there is a strong cache and minification as well, don't forget to clear all of it once the update is complete. I suggest following the safe update guide: https://goo.gl/c5zPZc
With version 4.9.x a few thing have changed, and are not backwards compatible anymore. I don't think it will affect your use-case, but here you can find the list of the changes: https://goo.gl/OQPw3mBest,
If you like my products, don't forget to rate them on codecanyon :)