jelenaskopje on "500 Internal Server Error after upgrading to Wordpress 4.0"

Hi guys..
This morning i tried to upgrade my site http://theoriginalscw.tv/
to Wordpress 4.0 but failed 3 times - kept getting an 500 Internal Server Error but after i went back to dashboard it seemed everything is fine.
Than i think i also upgraded some plugins and after 2 minutes suddenly i can not enter my dashboard nor mu site but instead i get an Internal server error... Here it is http://theoriginalscw.tv/
So what i did was downloaded wordpress 4.0 and uploaded the files via filezilla. Than i also downloaded a new version of the theme i am using (Newspaper) and also uploaded the files via ftp. Nothing worked.
I also tried deleting some of the plugins like wp-smash it and total cache but still nothing :(
Now i am afraid to upgrade my other sites... and have no idea what to do to get back this one.
Any clues what might be the problem?
Thanks