My b2evolution Version: Not Entered

My blogs was infected virus from hosting company, luckily that it was a
new blog. so i deleted all the file except /conf/ folder. And i upoload all the new files from a new package. But when i go back to the blog, i find it was in a mass.... you can see in the picture.

Did anyone can tell me how to fix it??

http://farm4.static.flickr.com/3330/3475227171_9c70be19f6_o.jpg