WPuser plug-in format registration form

I’ve installed wpusers plug-in, and amended the register form slightly so to have company name, rather than 1st name, but can you advise how to get the field to be full width like the other fields?

On the default form, the 1st and last name fields are set to be half width beside each other, but as I want to ask for a company name (to be displayed on their listings) I dont need the surname field.

I tried removing the css class from the first name field to make it the same as the other registration fields (username / email address)

uwp-half uwp-half-left

but no joy. It remains half width

https://www.cocktailmakingclass.com/register/

Also, with the account links all being handled by userwp, when logged in, the default “my account” navigation, doesn’t take users to their profile anymore, and i’m not sure how to add the links to “account”, “profile” and “change password” to this dropdown menu.

hope you can advise. Cheers

Ian