Hi,
it seems that there is a bug in the "Additions and Overrides"'s "Show Options" functionality . It doesn't shows ( or parses ) the user defined IDE Macros, but the user defined IDE Macros work in the "Compiler Commands" ( Before or After ) .
See in attachments that the IDE Macro 'AVRPART', while it works, it doesn't show in the "Show Options"'s "Execute After" tab.
EDIT:
FWIW, this is the "Execute After" "Compiler Commands" I use :
$ENV(AVRDUDE_DIR)\avrdude$(ExeExt) -p $(AVRPART) -c usbasp -Uflash:w:$Path($(OutputFile))$NameOnly($(OutputFile)).hex:i
regards,