Basecamp - Restore multiple backups

I have set up a number of different trips. To keep them separate (not understanding the list, list folder functions), I backed each one up separately to my hard drive. I now want to bring them all back into "My Collection" so I can split them into separate lists/list folders.

However, each time I restore one, it clears out all of any previous ones, and it will not let me Ctrl/Click to select more than one backup file. Is there a way I can restore all of my backups to the main "My Collection" list, so I can then split them into separate lists?
  • Tricky ...

    Short answer is no ... at least not using the restore function

    Long answer is ...

    Restore each backup. Export (not backup) the data as a gpx file to somewhere. Do this for all backups.

    Then Import (not Restore) each of those separate gpx files.

    In future use the folder/list structure :) or create separate databases rather then separate backups.