Quotes not working in Email Settings

When I enter HTML coding into the User’s Email Settings and hit Save, the system adds in backslashes right before the quotes.

I’m using the Premium plugin.

This is the HTML that I’m trying to use to produce my logo in the email signature. The logo is supposed to link back to my website. It’s been tested and works with other WP plugins that have custom email settings.

<a href="https://www.forwhatitsworth.us"><img class="size-full wp-image-532 alignleft" title="Machinery and Equipment Values - Equipment Appraisal" alt="Machinery and Equipment Values - Equipment Appraisal" src="https://www.forwhatitsworth.us/wp-content/uploads/2013/04/ForWhatItsWorD34aR03aP01ZL.png" width="266" height="142" /></a>

[Please post code & markup between backticks or use the code button. Your posted code may now have been permanently damaged by the forum’s parser.]

https://www.ads-software.com/extend/plugins/sp-client-document-manager/