That plugin appears to be compatible with OJS 3.3.0-x, and would need to be updated in order to work with 3.5.0-x. You might try contacting the plugin’s author to see if they are interested in making an update.
The preferred way to discover and work with 3rd party plugins is through the Plugin Gallery, which ensures that what you’re installing is compatible with your version, and has been code-reviewed for safety. If the developer of that plugin wants to get it into the Plugin Gallery, there are instructions here: