I think this is the same controller as the JL1 board that we dealt with in the $79 Cenoz laser engraver thread. That “upgrade.exe” program file is very minimalistic and gives no indication that it completed successfully… but if it also gives no indications of anything wrong, then it should be good. The progress bar usually appears to go to about 80% or so and then it completes so quickly as to not be seen/noticed and the window returns to its starting state. You’ll need to “trust” it at this point and move on to testing it to confirm.
Basically you’re hooking the Windows computer (with the “upgrade.exe” and “ROM.bin” files) to the un-powered controller board with USB cable per normal… and then you HOLD the JL1 button (between the USB and power connectors on the controller) while powering on the laser machine. That puts the board in “upload mode”. Run the “upgrade.exe” and a simple pop-up window with one button and progress bar… click the “Start Upgrading” button. Green progress bar starts and completes in less than a minute… no messages/status are shown and window return to same look as it began with. Power off the board and now stay away from that JL1 button… a number of boards were “bricked” IIRC when repeated attempts were made, thinking the first attempt had failed to flash the board. Start LB or some sender program and you should be able to connect and confirm that Grbl 1.1f is installed. If it is you’re done and you get on with configuring the Grbl settings to match your machine.
– David