Getting Started a reTerminal without Pre-installed OS

Imagine powering up a reTerminal and encountering the following situations:

• Accidentally selecting the "update software" option when you power up reTerminal thefirst time, and then the screen driver will be also flashed
• Need a specific version of the OS for your application?
• Flash the pre-installed OS that comes with the reTerminal

In these situations, you can not have graphical control over HMI.

Don't fret, I hope my experience could provide you some help