The raw files include amperometric data of single molecule detection for different types of polythiophene molecules. 
The only 4 relevant channels are: time [ms], Source current [A], Drain current [A], Gate current [A].
For the P3BT measurements the indexes of the columns corresponding to these channels in the same order are: 2/5, 3, 4, 7.
For the P3HT measurements the indexes of the columns corresponding to these channels in the same order are: 2/5, 3, 4, 8.
For the P3OT measurements the indexes of the columns corresponding to these channels in the same order are: 2/5, 7, 8, 3.