Hello, lodelia:
That sounds awful; I’m so sorry! I have only seen that happen once or twice before, so it’s a little challenging to say what may have caused it. I’d love to see if we could find out.
Could you please start a support case here:
http://endnote.com/support/contact-support
Feel free to put my name in the subject line so that it comes directly to me. I would love to get the document from you to see if we can ascertain the root cause so that this does not happen again to you, or to any users.
I noticed that you mentioned having X3 on one machine and X6 on another… May I ask why this is? You are allowed to install X6 on up to three computers for your own use, and it’s a lot simpler to do that than to switch versions constantly, especially since you can use Sync to keep the references in sync across the different machines.