How to Update Gymbase Theme?

Hi, I’m just looking for support regarding the Gymbase theme. I currently have version 11.4. But just noticed with the new WordPress theme update, some plugins stopped working. I believe the theme is outdated and needs patching? Was wondering if anyone could help me out? No idea how to update it through Wordpress.

Also, I have the ZIP files of the theme, but I never purchased it. I had a developer purchase the theme and set things up.

Unfortunately if the developer purchased the theme then only they will have access to updated versions

Unless they connected the theme via the envato plugin to receive auto updates, then you will need to buy your own copy or have the developer provide the latest copy