want to remove the menu bar for specific page

You can use “Theme Options > Other Settings > Custom CSS”. Insert here the following CSS code:

.page-id-2 #fixed-navigation-wrapper {display: none !important;}

You only will need to replace the page ID of your requested page. Here is a guide how to find it: https://www.ads-software.com/support/topic/find-page-id?replies=5.

I hope that my answer will be helpful for you.

Best regards
Tomas Toman – TT Themes