Guide: how to flash ATtiny13a based drivers (NANJG, QLITE, etc.) with custom firmware

Last week i received the BLF X6 driver from Banggood; sadly the MCU was locked down, so i couldn’t try Crescendo with it :frowning: According to this post i received the old version. I could try to replace the MCU, but i think it’s a bit too much of a hassle…