My apologies. The current version is configured for a Teensy. Try this...
• Load the TinyISP sketch
• Undo whatever changes you made
• Navigate to the TinyISP_BuildOptions.h file
• Locate this line...
#define RELAY_KNOCK_BANG_ENABLED 1
...and change it to this (change the one to a zero)...
#define RELAY_KNOCK_BANG_ENABLED 0
• Locate this line...
#define RELAY_SERIAL_ENABLED 1
...and change it to this (change the one to a zero)...
#define RELAY_SERIAL_ENABLED 0