Unfortunately, I get "Runtime Error 1004"- "Programmatic access to Visual Basic Project is not trusted" when I try to run the above statements.
However, I found another post pertaining to lost windows on the Office forum.
As suggested in this post, the following fixed the problem.
I used REGEDIT to rename
"HKey_Current_User\Software\Microsoft\VBA\6.0\Common\Dock"
to
"HKey_Current_User\Software\Microsoft\VBA\6.0\Common\Dock_Temp"
and then re-started Excel VBA.
This fixed the problem, I could now see all the variable windows "Locals, Immediate, Watch".
Then, as suggested, I deleted
"HKey_Current_User\Software\Microsoft\VBA\6.0\Common\Dock_Temp"