Comany Logo Not Showing In Emailed Invoice In Cs-Cart 4.03

I have replaced the “Demo Store” logo with our company logo using the new theme editor.

It works fine one the website, however the emailed invoices still showing “Demo store”. According to the help file all logos should be changed automatically.

What can I do to rectify the issue.

Also how can I change The word “Invoice” to “Sales order”?