Upgrading Plesk Expand means upgrading a number of RPM packages.
.rpm(Plesk Expand itself);
(Plesk Expand distribution repository);
.noarch.rpm(Plesk Expand base locale; US English).
Note: In these packages' numbers:
xxx is a version of Plesk Expand;
i586 is a binary package architecture mark. It should be compatible with the target platform architecture.
Before starting the upgrade, download the desired version of Plesk Expand (RPM version) from the Parallels web site here and save it on the server where you wish to upgrade Plesk Expand.