Last year, I installed an application on my Mac called Pocketcam. A few days later, I have removed the app from my Mac by dragging and dropping it into the trash bin. Apparently by doing that, it didn't remove the application completely as there are still some files left on the computer that is creating a log file in my document folder. The file keeps coming back after deleting it numerous times.

So my question is, "how do I find the file that is creating that file and remove it completely from my Mac?"