How do I edit my .htaccess file via FTP?

A common problem when uploading any file beginning with a period, like the .htaccess file, is that Unix hides this and any file that starts with a period.  So you can't see it when you FTP into your account, even if it's there.

The only way to update your .htaccess file is to overwrite it via FTP.  Simply upload your updated .htaccess file to /domains/[domain_name]/public_html/ (or wherever your desired location, generally the .htaccess file goes into the root of your site).