Futon is broken, where to fix

[Tim van Oostrom]

Hi, I am working on a project using couchdb. The couchDB server is on my 
Ubuntu machine, all good. However when I visit /_utils, the script files 
of the admin interface give me 404's. The _utils app worked before but 
broke after an OS upgrade.

I've searched for re-installing Futon but without result. How can I 
fix/re-install the Futon interface?

Thank's
Tim