Flashing doesn't change keys

Hi all, first post here.

I am having trouble getting my Model01 to change layout. I’m just changing a few basic things so far, to get my feet wet.

When I first installed the firmware and flashed it, it did the update thing and it worked, using Arduino, though I had to try a bunch of times to get it to work. Now when I try to verify it says
avrdude: butterfly_recv(): programmer is not responding for awhile and then exits. I have no idea what to try, can anyone give me some next steps?