Is my Dongle for cyton mechanically broken ?

I do a lot of experiments all afternoon long and it was ok for communications with my Cyton board( Mark IV 8 channels).
As i find the dongle brittle, i try to find a tiny box to surround it and try several. I don't found a correct one.
Trying to restart my openBCI_GUI, i was unable to establish a session: unable to connect to cyton, check hardware and power source. Found a dongle but could not connect to the board. And so on.
I tried every advice and how-to found in docs and forum. No result.
Looking at dongle programming in _cyton radio programming tutorial _ i read there should be a switch with a Reset position as shown on illustration:

This doesn't exist exactly the same on my dongle , see below :

I suppose it should be one i broke the handle and probably have changed switch position when trying too small boxes ( I gained the opposite of the desired effect, but what a bad design if the handle exceeds the width of the board as it seems !)
My questions needing help :
1) Can you confirm there must be a switch with a handle ?
2) Where should be the switch handle for communication (not Reset) : Close to the USB part (on the left in photo) or outward facing ? (i will try to move switch with some sharp object if no better idea )
3) Are dongle interchangeable or are they paired with the cyton board ? In other word, can i buy a new one without having trouble to install it ?

Thanks for help