I have tried all of you suggestions and still no where to be found.
My workflow is..
From [Create] open Balsamic
Create Mock up n Balsamic
Hit Save at top left in Balsamic
Name file in save window when prompted in Balsamic and hit save.
I then continue to save as I go.
I then hit the back button which took me back to confluence (probably
should have hit close)
Since that point, the file is no where to be found.
We are using Balsamic Mockups for Confluence version 2.2.32
I have now had to start again
Let me know if there is anything else you would suggest.