You can change the text that is shown next to an input as well a added a placeholder using the matador_application_fields_structure filter.
In this example we are changing the first name input, you would change the index to match the input you wish to change
If you want to remove the ‘:’ from the end of the labels
Use this code block:
add_filter( 'matador_application_fields_descriptions_colon', '__return_null' );