[ubuntu-uk] ubuntu 14.04.1 missing "Open With Decrypt File" in Nautilus?

[mac]

I've just upgraded to 14.04.1, and I find that Nautilus no longer offers 
"Open With Decrypt File" when I right-click on a .pgp file. (Yes, I can 
open gpg/pgp files in the CLI; but using Nautilus is quicker.)

The first item on the context menu is "Open With seahorse", which is, of 
course, not helpful.

I do have the context menu item to 'Encrypt' when I right-click an 
ordinary file, and that does work OK.

I have the latest seahorse-nautilus installed.

Google is not my friend on this one. I'd be grateful for any advice 
about how to restore the menu item in Nautilus.

TIA

mac