Here's the email I got. I'm not sure if it's OK to post it here but let's see if anyone cares.
From: <support@pro-pinball.com>
Date: 2 Sep 2016 3:25 p.m.
Subject: Windows Pro Pinball 1.2.3
To: <tim@**************>
Cc:
An update to the Kickstarter Windows version is now available to download:
http://download.pro-pinball.com/kicksta ... _1.2.3.exeChanges:
- Option added to the operator's menu to turn off sound in attract mode (standard adjustment 2.1.19)
- Popup added showing the controls the first time the simulation is started