Hi
You may also use the update script as per the wiki.
https://github.com/Psynosaur/DATV-Red/wiki#flashing-steps
Code
.\scripts\update_firmware.cmd 192.168.1.111 '..\addons\fw\PlutoDVB 0.3-22-gf41e\pluto.frm'latest build can be found here or see F5OEO wiki
Regards