I cannot get the "Extended Composer Blocks" extension to install. My site is tightly controlled by our web host and requires an FTP connection to install plugins. Is there any way I can upload it from the back end?
If you entered the license key on the main settings panel, you should then be able to install the extension directly from the newsletter extensions panel.
Or you can download the blocks from this site (see your account page) and upload them as you do with a regular plugin.