Updating MDL extension leaves two MDL entries in workspace list

Had the MDL extension installed in 2.2.10 and Just got the message that an update was available. Went ahead and did it. When done, I found MDL listed twice in the Workspace dropdown. Both entries brought me to the updated workspace (I recognized the changes from what was there before). I should have realized this meant there was only workspace but two entries, but tried deleting one anyhow. This left me with no MDL workspace, which makes sense in hindsight, since there was only one. The "workspaces" folder under Extension/mdl/0.9 is now empty, guessing I can repopulate it manually or something. Or delete the whole mdl folder and reinstall, until a real uninstall option is available...