Updates & Downloads

Forerunner 645 Music software version 3.11 Beta

as of April 18, 2018

For any issues that you encounter please fill out the form included in the download and attach it to an email to forerunner.beta@garmin.com. Please note that you may not get a response to the email unless we need more information on the issue you report.
In the process of troubleshooting reported issues we may access information in your Garmin Connect account, such as your activity files. More information about Garmin's privacy policies can be found at: http://www.garmin.com/en-US/legal/privacy-statement
Although this software is believed to be reliable, it has not yet been released for production and should be used at your own risk.

Connect your Forerunner 645M to your computer using the USB cable.
Download and unzip Forerunner645MBeta.zip. Click on the Beta folder. Place the GUPDATE.GCD file in the \GARMIN folder of your device's primary internal storage drive. Place the GUP2887_FORCE.GCD in the \GARMIN\REMOTESW folder of your devices internal storage drive.
Disconnect your device from the computer, approve the update on the watch, and wait for the update to finish.
If you would like to revert to the last public release software, download and unzip Forerunner645MBeta.zip and click on the Public folder. Place the GUPDATE.GCD file in the \GARMIN folder of your device's primary internal storage drive. Place the GUP2887_FORCE.GCD in the \GARMIN\REMOTESW folder of your devices internal storage drive. Disconnect the device. NOTE: If you revert to an older version of software, all of your settings will be reset to defaults.