@Stefan-Amundarain ,
It is always good to double check the firmware version of our ESCs and IO board (whichever you are using) so that you have control over the version that you are using and do not upgrade unless that is your intention or use outdated firmware. Typically when we release the new SDK we recommend updating ESC and IO board firmware because some features will require the update.
However, if you just receive a new board, you probably want to upgrade it to the firmware version that you have already been using or version required by the sdk.
Our voxl-esc tools (used for firmware update, checking) are used for IO board and ESC and make it easy to check and update firmware in an automated way to ensure you are running the firmware that you intended.
If you need more help with this, please let me know.
Alex