Have license key. How do I get support for BeTheme from Muffin Group

We hired someone to develop a site 3 years ago, and the developer used the BeTheme from Muffin Group. Now I need to make changes, but the changes are not being saved by WordPress. I have the license key proving purchase, but I cannot get the support system to recognize it. How do I get support? Must I go back to the developers I used 3 years ago and get them to ask my support question?

It is because your support has expired.
If you are interested to get support from the Item author (please check envato item support policy), you can extend/renew your support.

Extending and Renewing Item Support: