We currently have three Plesk nodes. Two of them are version 8.1.1 and one is version 8.1.0. SiteBuilder is version 4.0. We would like to upgrade all Plesk nodes to version 8.3 so that we can use the integrated version of SiteBuilder 4.1. The site backup feature in SiteBuilder 4.0 is currently broken as described in other threads on this forum (the script runs out of memory). Can we migrate all of our customer sites to the newer version of Plesk/SiteBuilder?