Background of the issue:
I am trying to unregister WPML from my website, hidden link, because the WPML license is expired. I attempted to click 'Unregister WPML from this site' via the OTGS Installer, but nothing happens. I have already deleted the plugin files and manually removed WPML-related tables from the database, as well as certain wp_options rows.
Symptoms:
Despite cleaning up the database and wp_options, the OTGS Installer still shows the site as registered and does not allow me to register or unregister it again.
Questions:
How can I fully reset or unlink this domain from your system to resolve the license binding issue?
How can I re-register or install WPML again cleanly?
1. Go to WPML → Support and click the Troubleshooting link.
2. In the Reset section of the Troubleshooting page, select the I am about to reset all translation and language data checkbox. Then, click the Reset and deactivate WPML button.