I don't have a clue how this plugin should work. Anyone?
Cryptoniq also has Litecoin. It is temporarily disabled. Wait for the new version. If you urgently need Litecoin, you can use the Nomiddleman (free WordPress plugin).
Cryptoniq is a WooCommerce plugin. All settings are intuitive. This screenshot you sent, where are the other payment options? These options may be disabled but are always available in the settings. According to this image I don’t know what you’re trying to do or what you’ve done so far.
Install WooCommerce, then install Cryptoniq, then go to settings and follow the instructions.