1. Connect the USB cable while pressing the Boot button.

2. Then delete the program with esptool.py.

You succeed once a twice. 

After that you will be able to write programs from the IDE.

This board does not have external IO0 used for bootstrap, so there is no way to force it into recovery mode. In the circuit diagram, IO0 is connected to K3, but it is actually IO47. It seems like a company that sells products without much evaluation.

I need correct schematic of that.