Can't view layout made from "updated" version?

A team member just finished some work on a layout and now I get this when I try and open the file:

Error loading board.
KiCad was unable to open this file, as it was created with a more recent version than the one you are running. To open it, you’ll need to upgrade KiCad to a more recent version.

Date of KiCad version required (or newer): 08/15/16

Both computers followed the same install process:

sudo add-apt-repository --yes ppa:js-reynaud/ppa-kicad
sudo apt update
sudo apt install kicad

My version says: Kicad 4.0.6
Theirs says: no-vcs-found-9485a4d…ubuntu17.04.1 realse build

How do I get the latest version?

This installs the repo for the nightly build version
sudo add-apt-repository --yes ppa:js-reynaud/ppa-kicad

this installs the repo for the stable version (4.0.6)
sudo add-apt-repository --yes ppa:js-reynaud/kicad-4

More details see:

You seem to have used the second option wheras your team member used the first option.

The nightly build version is not compatible with the stable release. (It is not guaranteed to be compatible.)

It is not a good idea to use the nightly build for production work. (Unless you know what you are doing.)
In nightly there might even be the problem that the version of yesterday can not open files created by the nightly of today.

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I thought that might be the issue so I ran this on my machine:

sudo add-apt-repository --yes --remove ppa:js-reynaud/kicad-4
sudo add-apt-repository --yes ppa:js-reynaud/ppa-kicad
sudo apt update
sudo apt remove --purge kicad
sudo apt install kicad

But I still can’t open the file.

Can he save it in a format I can view in the stable version?

What is the version of kicad after the update?
Is it still a stable version or is it a nightly version now?

No there is no option in nightly to save in a stable compatible format.

Are you using differential pairs or rounded pads, which are the features that cause problems with 4.0.6?

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