Update the uf2 file

Download the new firmware below (you can check the downloads page for the newest firmware update):
retroPy_beta_0p10.uf2

Instructions to install the update firmware (in order):

1. Press and hold the reset key
2. Press and hold the boot select key
3. Release the reset key
4. Release the boot select key

The button within the black square box is the reset key

Once done, a file manager window should open.
Simply drag and drop the firmware file you downloaded (retroPy_beta_0p10.uf2) into the file manager.