how how do i change http://www.domainforum.com/?wpforo=login

to http://www.domainforum.com/login   or   http://www.domainforum.com/?myforo=login

how do i do that ?

You've not followed me correctly. There is no way to change wpForo login/register URLs.

i will like to pay to take it off i dont like anything with prefix such as "WP" on my wordpress

We'll change this in future releases.

thanks for that info i was almost on my way to start my project with another option