Philip_Weir,
I verified that the 7_Zip file manager worked to unzip the files in Section 3.
Windows was blocking them on my windows 7 computer and on an older Windows XP computer.
Link to Z_zip is www.7-zip.org
Once unzipped you should see the following files (my drive:\folder for this is F:\01 Arduino Eng\code)
From Blink.zip
F:\01 Arduino Eng Kit\code\Blink
Blink.ino
sketch.json
From Fade.zip
F:\01 Arduino Eng Kit\code\Fade
Fade.ino
sketch.json
From Hall_sensor_test.zip
F:\01 Arduino Eng Kit\code\Hall_sensor_test
Hall_sensor_test.ino
sketch.json
From IMU_test.zip
F:\01 Arduino Eng Kit\code\IMU_test
IMU_test.ino
sketch.json
From Motor_test.zip
F:\01 Arduino Eng Kit\code\Motor_test
Motor_test.ino
sketch.json
From Motor_test_encoder.zip
F:\01 Arduino Eng Kit\code\Motor_test_encoder
Motor_test_encoder.ino
sketch.json
From Servo_test.zip
F:\01 Arduino Eng Kit\code\Servo_test
Servo_test.ino
sketch.json
From UltrasonicRF_test.zip
F:\01 Arduino Eng Kit\code\UltrasonicRF_test
sketch.json
UltrasonicRF_test.ino
Hope that helps.
Joe