Alienware Mouse AW610M: Firmware problem

I have big problem with Alienware Gaming Mouse AW610M.

I used "AW610M Mouse Firmware Update Tool" from Dell Support web, file name "AW610M_MS_FWUpdateTool_V01.03.08.38.exe".
And after this update, my mouse, instead of clicking ONCE, randomly clicks TWO times using the left key.

I have no idea how to fix this but my mouse is currently unusable!
Where can I download the old / original firmware?