Windows – How to change the theme of only one Office program

Are you sure you have the 64-bit version installed? It looks like the files were installed in the x86 program files directory, which only exists on 64-bit Windows. There's a 64-bit version of the Office beta available. It's possible that would work better.

If you already have the 64-bit edition, try this. It should work:

Choose which document type you want to set this for. Set it to open CVH.EXE. Open the registry editor. Go to HKEY_CLASSES_ROOT.docx (for example - replace .docx with whichever extension applies). See what the REG_SZ value (Default) is set to. By default it will be something like Word.Document.12, but it may be something different on your system. Then, go to HKEY_CLASSES_ROOT\Word.Document.12\shell\Open\command (replacing Word.Document.12 with whatever the value was you got from the last step). Edit the REG_SZ value "default" to whatever you want the command to be; in your case, probably "C:\Program Files (x86)\Common Files\microsoft shared\Virtualization Handler\CVH.EXE" "Microsoft Word 2010 (Beta) 2014006204190000" %1. (%1 is the filename which you are opening)

That should work! If it doesn't, I'll see if I can come up with any other ideas.

In looking for exactly the same thing, I found that microsoft has developed a free Theme Builder. You can find it on the MS website and there is a good discription of it here. How to Create Personalised Themes for Office. The software is free (opensource) and Microsoft provides an explanation of how to use it here. MS Theme Builder. This explains the PC version but I imagine that it is the same process for Mac.