Sounds very much like your theme needs to be updated to the latest version, which right now is Avada 5.6.
When it does come to updating and you are ready to do so, be sure to follow our update instructions. These are our detailed update instructions:
Updating from an old version of Avada? -> http://bit.ly/2pPNngZ
Important Update Info -> http://bit.ly/1FAmQpu
How to Update -> http://bit.ly/1H8JGzo
Fusion Patcher -> http://bit.ly/1QSd8Ol
Avada Change log -> http://bit.ly/1EK5mAg
Something else that is important is to also ensure any patches that our team releases between update cycles are applied as part of ongoing maintenance for your install and always clear your cache plugins post update
Patches are applied at the click of a button as explained in this help file -> http://bit.ly/1NAWVwM
If you need further assistance or have any further questions, please create a support ticket using the link below and our support team will gladly assist you
We look forward to helping you!