Flashing update on diyBMSv4esp32 controller + 4.40 modules

Hi, I have a working setup of diyBMSv4ESP32 + 16S V4.40 modules. I would like to update the whole setup with the latest code, and coudn’t find steps to do that. Do I have to disconnect the battery from the modules? Do I have to disconnect the JST comms? Do I loose all the controller setup (rules, mqtt setup, …)? I did not find anything in the docs, diyBMSv4ESP32/ProgrammingHardware.md at master · stuartpittaway/diyBMSv4ESP32 · GitHub

Thank you for your help, Jan