Updates & Downloads
Forerunner 645 Beta software version 6.36 Beta
as of October 31, 2019
View installation instructions
Notes:
- For any issues that you encounter please fill out the form included in the download and attach it to an email to [email protected] 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
- 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.
Change History
Changes made from version 6.20 to 6.36:
- Fix a lockup that could occur when saving an activity.
- Fixed an intermittent issue where the device would error out when trying to sync a music playlist using Wi-Fi
- Various CIQ improvements.
- Various stability improvements.
Changes made from version 5.90 to 6.02:
- Fix crash that could occur while using the device in Hebrew.
- Improve phone connectivity.
Changes made from version 4.20 to 5.74:
- Add support for Incident Detection and Assistance.
- Enable phone position injection to improve GPS fix times after moving long distances.
- Correct an issue where Treadmill Calibration could give incorrect values.
- Correct an issue where the Garmin Coach widget could become inaccessible.
- Fixed an issue where one couldn't Race an activity from the activity history menu.
- Fixed an issue where the device will reboot if using Broadcast Heart Rate with the system language set to Russian.
- CIQ Improvements 3.0.10
- Improved sensor error detection.
- Various stability improvements.
Changes made from version 4.00 to 4.02:
- Fix an issue that occurred when using the music widget to control music from the phone.
Changes made from version 3.70 to 4.00:
- Fixed an issue where the device could crash while using Garmin Pay.
- Fixed an intermittent issue where the display length during a pool swim could show invalid values.
- Fixed several CIQ 3.0 issues.
- Added Galileo Support
- Added Color Emojis
Changes made from version 3.40 to 3.70:
- CIQ 3.0 Support
- Add Altimeter pages and manual calibration
- Add text reply signature
- Fixed issue related to adaptive training plans
- Treadmill calibration improvements
- Fixed several other minor issues
- Translations Updates
Changes made from version 3.30 to 3.40:
- Added abnormal heart rate alerts. Enable these in Heart Rate widget > Heart Rate options > Abnormal HR alert. An abnormal heart rate will be detected if your heart rate exceeds the entered threshold for an extended period of time while sedentary.
- Correct an issue where CIQ Apps were not properly deleted from device.
- Correct an issue that could reset device if using specific text language files.
- Updated Translations
- Various Bug Fixes
Changes made from version 3.10 to 3.30:
- Added Physio TrueUp support. Physio TrueUp syncs activities done on other Garmin devices, allowing your device to more accurately reflect your training status and fitness. Activities from other devices will appear in the Activities menu, and they will update your Totals for Running, Cycling, and Swimming. Your Training Status, Training Load, and VO2 Max will be updated using activities from your other devices, and your Recovery Time will be also updated using data from other devices supporting Physio TrueUp. Enable Physio TrueUp in Settings > Physiological Metrics on the device or in Device Settings on Garmin Connect Mobile.
- Added support for REM sleep phase detection and improved the accuracy of the existing sleep algorithm.
- New Beta Feature! Extended Display will allow you to display your data screens on your Garmin Edge during a biking activity. Enable Extended Display mode on a supported Edge, and pair it to your watch as an Extended Display sensor.
- Updated Translations
- Various Bug Fixes
Changes made from version 2.50 to 3.10:
- Correct issue that could cause rapid battery drain
- Resting Heart Rate Improvements
- Wifi improvements when searching for networks
- Fix potential issue that could reset the device during an activity
- Updated Translations
Changes made from version 2.40 to 2.50:
- Added Trail Run
- Improved Floors Climbed Algorithm
- Improved Absolute Elevation Calculation
- Improved Rep Counting UI
- Updated Translations
- Changes to Support Factory
- Numerous Other Fixes
Installation Instructions
- Connect your Forerunner 645 to your computer using the USB cable.
- Download and unzip Forerunner645Beta.zip. Click on the Beta folder. Place the GUPDATE.GCD file in the \GARMIN folder of your device's 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 Forerunner645Beta.zip and click on the Public folder. Place the GUPDATE.GCD file in the \GARMIN folder of your device's primary 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.