Are there any compiled files (.hex) online to upload directly to the 3DR radios. 

I have upgraded my firmware without really thinking about what I was doing, and found out later that I could not communicate with the receiver. As I don't have a FTDI-to-USB cable, downgrading the transmitter to Sik 1.6 is actually much easier. 
According to this post, I can compile it on Linux, but it seems to be really complicated.
So, if anyone does have it, or have a link to download it, could you please share it with us

Thank you,
Safwen