Hi @brendan,

Are you referring to the search form displayed in the modal window when the directory search button is clicked?

We use BP Profile Search (https://wordpress.org/plugins/bp-profile-search/) to showcase the profile search feature on our demos.
You can edit the directory search form by visiting “Users > Profile Search” in your dashboard, where you will find every existing profile search forms.
Just edit your forms and click “Save” before leaving.

It should solve your issue.

To learn more about BP Profile Search forms, please read also the following posts:

Add new fields to homepage search form

My profile search form seems to be broken

Best,