I am using the virtual machine downloaded from Microsoft’s PartnerSource.
I have been successfully developing on it for the past few months, but now I am getting the “Insufficient rights” message when I try to open the development workspace.
Is there something that needs to be renewed (it’s being used for development of a plugin only).
The Demo license most likely expired on December 31, 2012.
Go to PartnerSource, where you downloaded the virtual machine application, and near the bottom of the page should be a download for Demo Virtual Machine Licenses. The new license says it expires on December 31, 2013.