How to remove the "backup folder MIGHT be visible" message

Hi I followed instructions for this and now my site is down and I cannot access my WP back end!

This is so frustrating. I am not PHP proficient and it scared the life out of me.
As this seems a common error, surely you can devise an easy fix for this.

Can you please provide an easy solution for this which I can implement once my site is back up?
https://www.tripreporter.co.uk

Can somebody please do something about this error? Every update I have to go back to wp-dbmanager.php to delete uncomment the
add_action('admin_notices', 'dbmanager_admin_notices');

Following the instructions (moving the .htaccess) doesn’t help. The htaccess is in it’s place but the message keeps showing up…

So I mistakenly renamed the file htaccess and it didn’t work. Make sure you type the “.” in front so it is “.htaccess” and then it works.
Thanks wayneulery