Python running is calling another (old folder) version of Class.  

Hi, 

 I have many different folders with different modifications of the code. 
My python running is calling another (old folder) version of Class. It seems freezes on a specific folder. 
I don't know how to change this. 

Can you give some advice on how to run with the class in the same folder? 

Thank you very much!
Welber Miranda.