Upload plugin directory to the /wp-content/plugins/ directory.
Generate Private and Public keys:
Go to SpectroCoin page and open
"Project" section, then click on your project. Select "Edit Project" and then click "Generate" button (next to the Public key field). You will get an automatically generated private key – download and save it. Matching Public key will be generated automatically and added to your project.
Save/change your Private key to wp-content\plugins\spectrocoin\keys directory as "private_key".
Activate the plugin through the WooCommerce -> Settings -> Checkout -> SpectroCoin.