You site is a Website Wizard creation. If you want to get your first page back to original, just go to the Website Wizard and use the "publish" option. This will overwrite your changes and put your colors and links back to where they were.
Even though you can see your web site pages from the File Manager, you shouldn't be using it to change the order of your navigation menu. Any changes made with the File Manager editors can not be pushed up to the Website Wizard's data base. If you then went back to the Website Wizard, changed some content, and then published, all your changes would be overwritten.