Old stack will not save or save as...

[Paul Dupuis]

I have a really old stack (the file ends in .mc for Metacard)

When I open it in LiveCode, the save and save as are disabled in the 
File menu. This us under Windows and the same in LC 4.6.4, LC 6.7.11 and 
in LC 9.6.0, the Save and Save As are enabled, but when I select the 
stack and try to Save As... it thinks it is saving "revRefactor" not my 
stack.

My stack opens and I can see and edit UI objects, properties and 
scripts. I just don't seem to be able to save it.

Just changing the extension to .rev or .livecode makes the stack 
unreadable in LC464, but it will still open in LC960, but still can save 
or save as (File menu items greyed out)

Anyone seen this? Know what to do?