One page template became a subpage?!?

Hi everyone,
first of all, sorry for my english but this isn't my mother-tongue.
Anyways, i'll try to be fast with my issue.
I recently used Creativity for my website (http://www.eesoa.com/sim).
I installed it with your quickstart and it worked fine. I completed the whole thing in a few days using all the modules in the position bottom1. They formed a vertical one page layout. Yesterday night, my colleague - by mistake - deleted the menu of the subpages (which contained the home, as i now understand).
Anyways, after that terrible event my website doesn't work anymore as the way it was. The new homepage puts all the modules in bottom 1 overlapping each one on the others. So, for the moment, i had to put all of them in the 'mainbody' position, losing the backgrounds alternation and the functionality of the mainmenu. In fact my links don't work anymore because the ids of all the divs aren't available anymore.
So in some way i have to go back to the previous way, but i don't know how to recreate the old menu subpages and the same homepage.
It looks like i've got a subpage instead a one page home.
Any ideas?
I am sorry if i wasn't enough clear with my speech.
Thank you anyways in advance.

EDIT: i forgot to say that i edited the css when the new homepage came up as a subpage. In fact in the version you can see now there was a Breadcrumb module. I hid it with display: none on the template.css

It might be hard to revert everything back to exactly same way.
Perhaps your hosting company offers automatic backups and you can revert database from backup made few days ago? Menu is entirely database stuff so you don't need to revert files from backup - only database.

Unfortunately nope, i don't have any database backup.
I mean there is no chance of getting the data i need from a sample quickstart and add just those to my database?

With deleting the menu you also have deleted some module position and assignment settings.
Perhaps the easiest way would be to install QuickStart again in sub folder or locally, and the recreate everything manually, starting from the menu, then checking template settings, ending on modules.
Please also check template assignment in template settings (take a note on duplicated creativity template and both copies settings)