Hi there,
I checked the case. If by the mobile menu you are talking about the screenshot I added to the Secure Note, then it is added using the plugin which we detected was the original cause of the problem.
Please contact the plugin developer to get help about the fact that it is not compatible with Visual Composer and our theme anymore.
For the header top right section I checked the working website and you added series of the code in the X > Launch > Options > Header > Misc > Topbar:
But in the new version the Topbar is off:
Please consider that we do not know what customization you do on your website and it is extremely time-consuming to find what you have done.
Unfortunately we can not give further comparison service between the versions and you need to do it yourself and adjust necessary changes yourself.
Thank you for your understanding.