How to configure and adapt Aimeos based shops as developer
Forum rules: Always add your Aimeos and PHP version as well as your environment (Linux/Mac/Win)
Same way as everywhere else: Extend from the class, store it in you own extension in the same directory structure as the original file and configure the new class name using https://aimeos.org/docs/Configuration/Core/admin/jqadm/product/option/config/name
Btw: If you only want to add something and don't want to touch the existing code, you can add a new subpart instead. Then your code is more update save.