Hi there,

Welcome to SeaTheme forum.

I need you to provide more information. For example, what exactly is the menu? Are the menu items missing or the pages accessed by clicking on the menu? What kind of shortcodes are missing? It would be even more helpful if you could provide screenshots. Do you activate a child theme?
In addition, plz make dure whether the BM contentbuilder plugin is updated also(refer to this tutorial manual-update).

Are you asking about upgrading multiple times, version by version (for example, first from 3.11 to 3.12 and then to 3.13)? If that’s your question, it’s not necessary. It can be directly upgraded from 3.11.10 to the current latest version. However, I still recommend that you make a backup before upgrading.

Regards!
SeaTheme – FAQs – WordPress Customization – Facebook

Hi,
Thank you for providing the information.
I suggest you put the customized or modified codes in the child theme file (learn more). This way, the modified code won’t be overwritten after the theme is upgraded.

Regards!
SeaTheme – FAQs – WordPress Customization – Facebook