We have fixed the problem.
Breafly, this was our problem:
Modules dissapered, Submenues, dissapered. Modules like Flash players, links and more.
When MJ is installed it ads meunes in the menulist when you edit modules.
Lets take an example:
Lets say we have this menus:
..................................................
HOME - ABOUT US -
And under ABOUT US are submenus: About our dog - About our cat
In our HOME page we have 2 modules with big squares with image links:
1: Flash-ads 2: Web-player
.................................................
In Extensions / Modules we have a About_US_MENU.
Open it, and we have a list where this module is active (Main Menu - About us).
But now when we installed MJ it had added Mobile_Menu ( I followed the installation vodeo tutorial, which includes creating Menu_mobile).
Under Mobile_menu there is another a About us, Select it also so that you have selected both About us.
Done, now your submenues Our Dog, OUR CAT work.
Open Your Flash-ads module, it is active in HOME under your Main Menu list, but select also HOME under Mobile_menu.
Done now your Flash module is visible again on front page.
Repeat for Web-player module.
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Why Mobile_menu mess up Desktop site is a mystery.
I hope this healp if You have same problem.