[Plugin: BuddyPress reCAPTCHA] Linking to register.php

Hi.. I just installed this plugin and it seems to be working, problem is I cant find where to change the URL to this page:

https://www.ultimatechat.net/register/register.php

I find when I click on the Sign Up button on this page:

https://www.ultimatechat.net

it takes me here instead: https://www.ultimatechat.net/register

where do I make the change so I can use the correct page?

Thank you for any help,
Sharon

https://www.ads-software.com/extend/plugins/buddypress-recaptcha/