...
- manually by uploading plugin archive to FTP of your FTP hosting using any FTP client;
- through hosting file manager by uploading plugin archive;
- manually by uploading plugin archive in .zip format through WordPress site admin panel in "Plugins" section.
...
or /wp-admin/options-general.php
CHANGELOG
The list of plugin versions: https://data.otcommerce.com/public/ot-external/CHANGELOG.txt