I am new to using Concrete5 and I am working to update an existing site for a friend. They have a pretty old version of concrete5 (5.3.3.1). How do I go about making this upgrade?
Do I need access to the hosting server?
Yes, you'll need access to the hosting server. Here are two guides that should help you through the process. Be sure to backup your files and database before you start upgrading.
Upgrading very old sites:
http://www.concrete5.org/documentation/how-tos/developers/update-ve...
General upgrading information:
http://www.concrete5.org/documentation/installation/upgrading_concr...