By far the biggest release of Path Copy Copy ever, this major release has tons of enhancements and bug fixes. I could go on listing them all, so I will. ;-)
This is a recommended update for all users. The update will be pushed through the software update mechanism soon.
About the portable installer: it installs Path Copy Copy for the current user only; aside from that, it works pretty much like the regular installer.
About the Windows Installer package: it installs Path Copy Copy using default, network environment-oriented settings. It is not possible to configure the installation through command-line arguments like for the regular installer; if you need to set registry values, do so after installing Path Copy Copy, perhaps through a script.