The icon is incorrect and shows pdf instead of a picture icon.
This was originally raised in 8.10 with hope to fix in 9.10 (see NXP-21159).
Finally it has been fixed in 10.10 and later versions (see NXP-21153).
It is now needed for 9.10. Please update.
In 10.10 it's here:
In 9.10 it's here:
export Thumbnail icon must be changed
Export option window and icons are incorrect