"Support System" Plugin Form Configuration

Hello, I need the ability to slightly alter my "New Ticket" form on my website for Support System. Specifically the drop-down menu "Are you reporting a ticket for a specific site?", I have no use for.

How would I go about removing the 'Default' option, and only show the single website that the user is a member of?

Do not want this to be an option: https://puu.sh/rvOCG/50c9cf2752.png

The bottom entry was selected as default, and is submitted from the multi-site, instead of the proper child site: https://puu.sh/rvOGR/089340c07d.png

Thank you.