Hello,
I have seen the mentioned page and the attached screenshot very well and update you that I will comfortably alter the text, and change a textbox into a dropdown list of options on a page which is powered by WooCommerce Product Vendors plugin, that allows users to register as "Vendors".
I will also completes your task in a way where updates to the plugin won't effect the changes exactly to your mentioned requirements.
We also have a professional and certified team of designers and developers who are expertise with CSS, HTML, PHP, WooCommerce, Website desvelopment, WordPress, theme/plugin development, customisation, etc.
We will completes your task exactly as per your needs asap and also provide you a complete help for long term relations as well.
Can we have a small interaction through chat where i will start your work.
Regards
Peter