Not knowing much about the inner workings of the IDE, but if you can get in there to add in the -F, then can you instead insert the correct chip into the Avrdude call?
It might be easier to work direct with Avrdude from the command line.
Not knowing much about the inner workings of the IDE, but if you can get in there to add in the -F, then can you instead insert the correct chip into the Avrdude call?
It might be easier to work direct with Avrdude from the command line.