The document format is compatible from v7 to v10. I'm not sure what you are trying to accomplish by saving with the new version. If you schedule the document reloads with the version 10 publisher or QVE, they should work going forward.
What is you set-up? Are you using server or are these stand alone docs?
I'm guessing you want to get the new meta data into your files, which I beleve requires a reload. There is an entry in this thread http://community.qlik.com/message/116136#116136 where comeone discusses setting up a mass reload. I believe you could also use a FOR command from the command line.
I am using Server to perform my reloads, but I am trying to read in Meta data per one of the new docs posted here http://community.qlik.com/groups/meta-model-qv-power-tool. It requires that all docs need to be in the V10 SR2 version, meaning opening, saving, and closing each one.
I guess I was more of checking to see if there was a quick way to do it rather than scripting. I didnt want to go through all the work to find out later all I had to do was *insert easy way, you'd have to be dumb to overlook*.
Thanks for the replies, I will write a script to do a partial reload of a few files to test it out.