I have Windows 7 installed on my laptop and I use the latest version of Sony Ericsson PC Suite to perform back up and restoring operations. When I want to synchronize there is no applications available to sync.
With the latest version of Sony Ericsson PC Suite, you can synchronize only contacts, calendar entries, tasks, notes and bookmarks. You can't synchronize applications from your Sony Ericsson devices. I suggest you contact Sony for further information.