Mac OS - PyCharm 2017 running file as unittest when not

I have a file that I call test_sim.py (I've also renamed it to 'testsim.py'). When I hotkey run script (shift + control + R) pycharm runs this file as a unittest. It's not a unittest. I'm simply running my file called sim.py with various inputs. If I go to 'Edit Configurations...', I also see every file I've run previously. When I erase the unittest configurations, then go to the `if __name__=='__main__'` and right click to run the file, it runs properly. But after I do that if I hotkey run it, it goes back to a unittest run. I also noticed that in the 'Edit Cofigurations...' I see every file I've previously run. 

I want to be able to run files starting with the word 'test' or 'test_' not as a unittest file. How can I achieve this? How can I configure pycharm to not unittest unless I specifically configure the file to be a unittest file? And lastly, how do i setup the configurations to only have one function called "Run" that will run each file the same and not make new run configs?

A lot has changed for me when I updated to the 2017 version of pycharm. I had just purchased a new computer, and had to install all the dependencies I need. I decided to also update pycharm to the 2017 version. So, this may not be a 2017 issue. Previously I didnt have this issue. And I don't believe PyCharm kept a running log of each file I ran. Maybe it did, because I do recall seeing the name of the file at the dropdown when I ran it.