I tried to install bianbu onto eMMC i downloaded bianbu-24.04-desktop-k1-v2.2-release-20250430190125.zip(md5 checksum was ok) unpacked it into a directory and run flashserver from there by running sudo ~/.local/bin/flashserver. (I unpacked the flashserver 1.25beta from the AppImage as suggested by several users in this forum) I hit 1 in Available ports which was fastboot VID:PID=0x361c:0x1001 SER=dfu-device. I cannot confirm this method works since the flashing process was interrupted I was using a damaged USB cable but it seemed to work, the system seemed to boot but I got a blank screen and busybox via UART obviously it did not finish the flashing process.
After that I tried to run ./titantools_for_linux-2.0.1-Rc.AppImage —no-sandbox setting it up was straightforward just select English. I managed to successfully flash the board.
To enter DFU mode I power on the board then press and hold the FDL button then press release the RST button then plug in the USB cable and then release the FDL button.