Default site for wordpress installation

Hi,

I'm sorry if this question has been asked but I couldnt find an answer to it....

I just added a new domain in Plesk and then went on to install wordpress.

The WP installation is in .com/wordpress/

How do I get my website to point to this folder as a default?

I cannot change the document root udner hosting settings because it says I have apps installed.

Help much appreciated

Thanks!!