This may seem like a silly question but I'm in need of some help.
I've just been hired on to take over an existing website run through Concrete 5 and am in need to update the existing theme. The old developer had a falling out with the company so I am unable to contact him. I have full access to the admin account to update the website but was wondering how to access the root directory for uploading personal themes? I would be thankful for any help.

,Nic