Hello, I'm going to change the url of my site, and will respectively change the one in the forum. How do I change the forum url?

Edit your conf_global.php and change the base URL there.

15 hours ago, Tarun said:

Edit your conf_global.php and change the base URL there.

In the database do I need to change anything? Type name, passwords, addresses?

As far as I recall, no.

3 hours ago, Mcappellreis said:

In the database do I need to change anything? Type name, passwords, addresses?

You may need to run the support tool rebuild your datastore file but nothing else need changing once done the con_global.php file 

Make sure you change license URL in Client Area.