I think I may have made a big mistake here.
I had changes to make to several projects at once so rather than open each project, I created a new master project and added all the projects as subprojects. This has converted all these projects to "Subprojects" and therefore removes them from the list of projects in Project Centre unless "Subprojects" is checked.
Post changes, how do I remove the subprojects from the master project now and how do I now convert the subprojects back to normal projects?
If I open the properties of the subproject and check remove link it converts the subproject into actual tasks in the master project and the subproject disappears from the projects list in project centre altogether?! (Verified that project does still exist in PS2010 by looking in "Delete Enterprise Objects")
And as the newly converted subproject into tasks have actuals against them, I can’t remove them from the master project.