That looks very promising. But doesn't answer my question entirely..
Let say I have 500 .doc files spread over several folders, having different content types and metadata. I don’t want to move the files to a different folder and I don’t want to the converted files to reside next to the original. But instead in-place convert them to *.docx, replace the original but retaining versions and metadata.
Is this possible? What would happen if I restore an earlier version (when the file was still *.doc)? Are all the earlier versions converted as well?