fotowall no export button

Hello,
I am working with fotowall 0.98~beta+git20150707-1, the current version that is supplied via Ubuntu 15:10 package-managenement system. After having finished my collage, I would now like to export it to a format like .jpg , .png or something like that. On screenshots of other users, I see that there is supposed to be an "export button" above the save button in the right upper corner of the screen. In my version there is just the save, but no export button. Unfortunately pressing the save button does not allow you to choose any other format than .fotowall - either does just entering the wished format-ending! I do not find a printing possibility or any other opportunities in the menu as well.
So, I would be very grateful for help!

Thank you very much in advance!!

Manuela

Screenshot of workspace and close-up of corner where the button should be:
https://www.dropbox.com/sh/m32cm2wggm85sid/AABglfr91P_j7LGxNvM6cLLDa?dl=0