Plotting selected column vs column from multiple .dat files in one graph

Hello matlab comunity,

I have 60 similar file as the attached two.I want to plot coulmn 2 vs column 7 as (x,y). All 60 curve in the same graph.

Can you help me to write a script with these two files then i will extend it to 60.

My actual data are in ascii format(.dat). I can not attach .dat so i have converted then to .txt and attached here. Will the same script work for .dat file also?

Thanks a lot in advance.