Redux works because it's extensible by hooks. If you modify the core directory, or attempt to add your own stuff within the core directory, any other version of Redux WILL override your code. Never ever modify the ReduxCore, only extend it via hooks and filters. ;)
Your options configuration.
You can add additional plugins if desired.
https://docs.reduxframework.com/extensions/using-extensions/
Place all extensions within this directory. An example would look like:
- ~admin
- redux-extensions
- extension
- metaboxes
- extension_metaboxes.php
- metaboxes
- extension
- redux-extensions
Place any custom configs extensions, that should not be added to the standard options-init.php file, within this folder. These will be auto-loaded.