PlutoSDR DFU mode

Hello Gentlemen,

A few days ago I bought an Adalm Pluto SDR, I did the first Test of reception and it works very well.

I tried to make a change after this tutorial:   https://www.youtube.com/watch?v=C2LtY3ZJ_wc&t=22s  I did not succeed, I probably did not do something right or it was not the software.

After this failed operation, plutoSDR does not do anything, no longer sees any COM port, the computer no longer recognizes it as a storage unit.

When connecting to USB sees only the Device Manager PlutoSDR DFU.  

Has anyone else happened to this wonderful little box?

Please help me,

Thank you  (Victor - yo3dex)