Birds Eye View and Basecamp

I use dropbox to sync BC between 3 computers. I downloaded a Birds Eye View file and it was stored in DropBox/BaseCamp/JnxFiles with a .jnx extension. The file shows on the downloaded computer as an overlay file. When I go to a second computer, the BEV does not show. Is there a way to sync BEV files using dropbox. Not sure what would happen if i downloaded the same area from another computer. I think it would duplicate the file and only work with the downloaded computer. I don't want or need BEV on my GPS but the maps add useful information to BC.

Thanks