Free Version
Until you receive and apply the license key, the module operates in the free version. Essentially, it is the same module but with limited functionality. Externally, the free version is indistinguishable from the paid version, except for the (free) label next to the module's name in the header. For example:
Attribut&pro v1.0.0 (free).
The limitations of the free version concern making changes to the database. You can perform any actions with Attributes or Values, just like in the paid module, but the changes will not be saved. After reloading the page, everything will revert to its original state.
The free version is designed to familiarize you with the module's functionality, evaluate the convenience of working with attributes, and check the module's compatibility with your OpenCart store.
Some features in the free version are fully preserved, such as Drag'n'Drop sorting of Groups and Attributes.
For the free version, no domain name approval is required.