Sure! Just go to your account, then click “view licenses”, then “view upgrade”. There you have options to pay the additional amount. If you upgrade from single site to 5 sites, the difference is 34 dollars. But if only half a year is left on the license, you only need to pay 17 dollars for the upgrade of course!

To install the plugin, you can follow these instructions

When you purchase one of our plugins an account is created automatically. You can reset your password here. 

If you don’t remember the email you used for the purchase, or did the purchase before the automatic account creation was activated, please contact us and we’ll set it up for you. 

You can create a new password via the following link: https://really-simple-ssl.com/wp-login.php?action=lostpassword

Installing the free version of the plugin is done via the WordPress plugins overview. In WordPress, go to ‘Plugins’, click on ‘Add new’ and type ‘Really Simple SSL’ in the ‘Search Plugins’ search box. Really Simple SSL will show in the results. Pressing the ‘Install now’ button will install the plugin, pressing ‘Activate’ will activate the plugin.

After activating the plugin, the plugin does some checks on your site. Then you can click “Activate SSL”. Before pressing this button make sure your website has a valid certificate. This can be tested at the Qualys SSL Labs SSL Test.

See the following article for more information about installing the pro plugin: https://really-simple-ssl.com/knowledge-base/install-really-simple-ssl-pro/

When getting a ‘this email is not authorized to renew license’ error, try clearing cookies from your browser. That will likely solve the issue.

If you click the download link after you have purchased a plugin, you should download a zipped file which you can upload to WordPress. If this is not the case, you are probably using Safari. This is easy to fix. Go to:

Safari > Preferences > General > Open “safe” files after downloading: uncheck.