The extension does not require any further settings during installation. You only need to agree to the license agreement.
To be able to use the extension, a user requires at least read permission to table 79 Company Information for all clients he or she should see (e.g., via Permission Set "D356 BASIC").
If the user is supposed to make changes, he or she also needs change permission for the table (e.g., via Permission Set "D365 BUS FULL ACCESS").