If you try to flash an Xperia Ray (2011) with Flashtool 0.9.34, the program will either crash or throw a "Unknown header type 0x0" error. The flashtool09110windowsexe patched build retains the legacy sin_core.dll and libusb0 stacks that modern versions abandoned.
: Execute the file and install to a root directory (e.g., C:\Flashtool ) to avoid permission issues. flashtool09110windowsexe patched