DSO nano new bootloader firmware

Hi !

I´m new here and have a “little” problem with my SainSmart DSO201 Nano.

I tried to install the BenF 3.64 App.

I turned on the power-switch with pressed “-”-Button, so the DSO registered as a virtual-usb-drive on Win XP.
Then I copied the two Hex - Files of BenF in this directory and turned off an on the power-switch.

The tresult is: the DSO don´t boot anymore (as you can see on my Pictures).
It freezes in this screen.

Then I tried the options posted by Alf (DSOFlash.zip) , but it don´t work.
Now the DSO shows added “No APP found”.

What can I do ?

thanks