Install arduino ide latest version. matter control will also install arduino drivers for you. I’ve found that auto connect settings don’t work, or at least, don’t work well. figure out what your com port is, and then set baud rate to 250000. It should then show up under whatever slicer or host software that will connect with an arduino. did you get a package with lcd, it’s not required, but if you have an lcd you can find out if everything is working without it being connected to the pc.