oh no! I only just saw this.
Prusas have two reset buttons: the factory reset process (which I think you did: front X button plus the dial button, as detailed here: [Factory reset](https://help.prusa3d.com/en/article/factory-reset_2216)) plus the indent next to the USB port.
Prusa claim it’s impossible to delete the bootloader firmware, so if these don’t work, try their technical support.
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