Kindle Fire HDX7 Qualcomm QDloader

Hello,

I have successfully installed safestrap and CM11, When trying to unlock bootloader in order to install TWRP so I`d be able to install CM-13 I accidentially flashed original firmware (update-kindle-13.3.2.3.2_user_323001720.bin) and bricked my device. From XDA forum I find some fragments of informations, it should be possible to unbrick. Windows sees device as Qualcomm HS-USB QDLoader 9008.

Is there any possibility to reflash any working firmware, or I just created expensive paperweight? Should I provide any more informations to you guys be able to help?

Any help will be really appreciated

//EDIT
I am also quite expirienced with Linux, so some linux hacking is possible. With windows... you know :)
Also I have backup of original OS done by safestrap, if it means anything

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