If you don’t like or not able to upload the templates via the Templates section you can upload the files via FTP.
- Extract the archive you’ve downloaded
- Copy the extracted folder to your webspace into “wp-content/uploads/mailster/templates”
Keep in mind that the “wp-content” folder has maybe a different name on your WordPress site.
You can now find your uploaded template at Newsletter => Templates.
All images like screenshots and module previews are getting generated automatically.