I added this:
# Mail Poet RewriteCond %{REQUEST_URI} ^/wp-content/plugins/wysija-newsletters-premium/ [NC] RewriteRule . - [S=13]
and saved but am not sure about steps 3 and 4 in the process:
Root htaccess File Custom Code Setup Steps
1. Enter your custom code in the appropriate Custom Code text box.
2. Click the Save Root Custom Code button to save your custom code.
3. Go to the Security Modes page and click the AutoMagic buttons.
4. Activate BulletProof Mode for your Root folder.
I’m not sure which automagic buttons to click, I don’t want to crash the site – please help me here!