ATTENTION: The BSL internal FLASH table entries are changed, affecting the contained ATMEL/ADESTO Flash types (AT45 DBxxx). Using such a FLASH on your hardware needs a NEW firmware with a parameter parsing fix.
Check if the firmware containing rcX Toolbox >= V1.9.0.0 (see libsused.txt) Otherwise write to FLASH is NOT possible anymore (neither storing any file, nor storing runtime data)!