Office 2010 Template - Error 0x80070645

I created an Office 2010 Professional Plus virtual app using the Office 2010 Template from ZAV 10.

It works fine when I launch Office from the executable.

However, when I launch it indirectly by double-clicking a .docx or .xlsx file, this message appears: "The applicate has encountered an error. This action is only valid for the products that are currently installed. (0x80070645)"

I am using Spoonreg.exe to register the virtual app.

I get the above error on both XP and Windows 7.

There was a forum thread a few years ago about fixing this issue for Office 2003 and Office 2007. I wonder if anybody knows how to fix it for Office 2010?

Thank you.