How to obtain SW version of DS3 Smeg+ Navi

[andr3ahh]

Hello! I am having troubles with my Smeg+ Navigator installed on my DS3.
I have only 3 buttons below it, which are "MENU, +, -". What do I have to press in order to obtain my Sotware's version?

Thank you!

[Toxic]

Usually hold one of the buttons in for about 5-10 seconds

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