Sept 26, 2013. You should have FTP access to a Garmin file store to download it.
Most all of the changes were in support of the Evolution.
From: Jon Socolof [mailto:jsocolof@ershire.com]
Sent: Wednesday, December 11, 2013 7:38 AM
To: lml@lancaironline.net
Subject: G900X
I keep receiving Service Bulletins from Garmin stating issues will be resolved in a future software update. When was the last time anyone got a software update?
Jon