Hey there strider1551, hope you’re well today!
You should be able to remove advanced tab with some custom CSS. Please try adding the following CSS code in the style.css file of your child theme or if your theme doesn’t have custom CSS tab add it in your site using the following plugin:
https://www.ads-software.com/plugins/simple-custom-css
li.incsub_wiki_link_advanced_edit {
display: none !important;
}
This should remove the advanced tab, normally I wouldn’t suggest the use of the !important declaration. However, it can sometimes be a necessary evil when over-writing existing styles. You can find more info on the use of important declaration here:
https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity#The_!important_exception
As for changing Create New since the word is translatable you could use plugin translation files to change it to what ever you want. You’ll find more info on how to translate plugin here: premium.wpmudev.org/blog/how-to-translate-a-wordpress-plugin/
Hope this helps ??
Best regards,
Bojan