AVR tries to download, however, it reports,
avrdude: veriification error, first mismatch at byte 0x0047
avrdude: veriification error, content mismatch
Red led is now blinking 4 times a second, i guess this reflects the error.?
I noticed when i compile with compilation checked in preferences, avrdude has many red lines, i guess errors, to many to paste in here.
As it stands, it seems to me that avrdude.conf and avrdude.exe just don't work, i also note that there are at least 30+ versions out there on WEB.
Which one should your customers use, the conf file on adafruit obviously doesn't work, as i have never got this far before using it.
Getting very frustrated here, it shouldn't be this difficult.