Existing Platform users can automatically update by clicking Help – Check for Updates… The PortableApps.com Platform™ is a full-featured portable software system that ties all your portable apps together and lets you build your own custom portable app suite for use in your synced cloud folder, on your local PC, or on a portable USB drive. And it’s kept separate from your local apps.
Source: PortableApps.com – Download PortableApps.com Platform
