Remove "show All" from menu?

Hi,

I Am using Grid Gallery Pro version. I post this issue already twice to the support site but I don’t get an answer from them! ;-(
So maybe I can get here an answer:
How to remove only ‘show all’ from menu?
I want to show all other menu items except Show all.

See my site: http://www.ansign.nl/?page_id=19

Hope someone can help me!
Thx
Marco

https://wordpress.org/plugins/easy-media-gallery/