A client of mine was trying to send me some BikeCad Pro files. He uploaded them onto Dropbox, and when I saved and opened them the only thing to "change" was their custom paint- all of the frame numbers stayed at the default template size.
I am guessing he is not fully saving the designs before uploading them into the Dropbox folder, but there may be something more to it that you can id simply. He is on the newest version, and I am on the last gen. Would you expect that to cause any issues?
I have found this: http://www.bikecad.ca/permissions, and may be interested in the second option to publish the model, but not include it in the Design Archive. I am unsure how/ where to save BikeCad Pro files online.