This is not a theme issue, the WordPress menu system is 100% controlled and driven by WordPress.
All the Salutation theme does is style the menu, i.e. it makes it look the way it looks.
To create a menu item that does not link to another page when it is clicked you need to make a Custom Link item and set the URL to #
(i.e. the current page).
If you need help building WordPress menus please refer to the official documentation…
WordPress Menu User Guide → https://codex.wordpress.org/WordPress_Menu_User_Guide
If you need to learn how to use WordPress then I can recommend the WordPress Lessons, they are a fantastic resource…
WordPress Lessons → http://codex.wordpress.org/WordPress_Lessons
If you can’t get on with the lessons and you need more help then you can ask questions in the appropriate WordPress support forum…
WordPress Support → http://wordpress.org/support/
If there is anything about the Salutation theme itself you need help with, please just let us know. If you can’t find a solution using the forum search please create a new topic for each separate issue and we’ll do our best to help. Thanks.