As you have purchased the upgrade to the OAuth Client and merged free plugin with the premium, first you have to activate the premium plugin. Please refer below steps to activate the premium plugin.
- Go to https://login.xecurify.com/ and log in with your miniOrange account which you have used to purchase the license.
- Go to License -> Releases and Downloads tab and download the premium plugin.
- Now, go to WordPress and uninstall the free version of the plugin and install the premium version.
- Go to the miniOrange OAuth tab and log in with your miniOrange account which you have used to purchase the license.
- Enter your license key. (You can find the license key under miniOrange Console -> License -> View License key section).