Snom370/Firmware Update Wizard

From Snom User Wiki

1. My snom370 is running a firmware version 7.X (below 7.3.7).
   • I would like to update to the latest released Version 7.3.7.
   • I would like to update to the latest released Open VPN Version 7.3.7.
   • I would like to downgrade to the latest released Version 7.1.35.
2. My snom370 is running a firmware version 7.X (below 7.1.35).
   • I would like to update to the latest released Version 7.1.35.
   • I would like to update to the latest released Version 7.1.33 + updated bootloader V 1.1.3S (eliminates EHS boot problems).
3. I don't know which firmware version is installed on my snom370. Where can I find this information?
4. Where can I download the source code of components licensed under GPL? and where can I find the original GPL license text?