You could add a field to use as the title and then use an acf/save_post filter to copy the value of the title into the post title. There’s an example of this here https://support.advancedcustomfields.com/forums/topic/createupdate-post-title-from-acf-fields/
You might want to log into your account and see if you can download a copy of ACF5 Pro. At one time people that purchased one of the premium add ons were eligible for a free upgrade to Pro, but I don’t know if this is still the case, it may have been a limited time thing. But if you log into your account and you are then it will be listed in the files you can download.
