I'm currently using InDesign5.5 and I'm getting an error message when trying to open files that originated in InDesign6. It's asking me to upgrade the following plugins:
Generic Page Item.InDesignPlugin
How do I find and upgrade these plugins? Any help is greatly appreciated!
You don't. And if that's the error you're getting you need to update
CS5.5 to 7.5.3.
The CS6 user will have to export the file to IDML and send that to you.
Don't expect a perfect translation.