Your system information

• Steam client version (build number or date): steam-1.0.0.71-1 (native)
• Distribution (e.g. Ubuntu): Arch Linux
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

After the latest update, I can no longer enable Steam Play for all titles, every time I check the option on the settings page for Steam Play and restart the client, the setting doesn't stay set.

Steps for reproducing this issue:

1. Click "Enable Steam Play for all other titles" on the settings.
2. Optionally choose your desired version of proton (it doesn't work no matter what I pick).
3. Restart as prompted.
4. When the client is up again, the setting will not have saved.