HostGator Import Help

Good morning. I actually had this done before – but life happens. I was going through the theme yesterday – and WP started showing me a bunch of updates. Since updating I’ve lost some functionality to the editor and such – no idea of I can fix it. What I’d like to do is re-import the main demo theme and reinstall. I’m currently searching for some way to downgrade WP because I think it’s the upgrade that messed things up. I’ll be in and out so please bear with me where the replies are concerned. Thanks in advance.