TwoNav Aventura has to software levels :

• TwoNav: Executed over the operating system and interacting with user.


• Operating system: Executed under TwoNav and controling the more basic operations of the device.

Normally, software updates are for TwoNav, but operating system can also have updates.

In order to update the operating system of TwoNav Aventura, please follow next steps:

1. Download the latest version of the operating system from 'download' area and copy the 'Upload' folder in the root of Aventura's SD card


2. With Aventura powered on, keep 'Update OS' button firmly pressed with a stylus.


3. Without releasing the 'Update OS' button, press shortly the 'Reset' button with an other stylus or similar object.


4. System will reset and update process will start with a blue screen. Just wait some seconds until the process finish and system is automatically reset.

Notes:

- 'Update OS' button is behind SD card compartment rubber cap, at left of SD reader, beside the audio connector.

- 'Reset' button is also behind SD card compartment rubber cap, but on the other side, just beside the serial port.

- If 'Update OS' button is not pressed strongly enough, it will not work and only a simple reset will be made when pressing 'Reset' button.

- If 'Reset' button is pressed for too much time, system will not re-start so Operating system will not be installed.