Current models: 14-150mm F/3.5-5.8 Di III (Model C001)
The firmware of Tamron lenses with the Micro Four Thirds mount can be updated to the latest version by using your camera.
For information on firmware releases and how to update, please go to http://www.tamron.jp/en/support/c001_firmware.html and scroll down to the Firmware section.
Release notes on lens firmware updates via Tap-In-Console can be found here.
You can find TAP-in Utility for new Tamron lenses here.
You can find PDF versions of Tamron lens instruction manuals here.