How to change the ROS logs back to one new log per execution?

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Hello,

I've been working on a project for a while now, and had my log files all set up to give me messages to help debug each time I change and run a new file using a roslaunch command. This morning, I started working on things, and was perplexed to find that instead of creating a new log file I could access through the ~.ros/log/latest, it has started appending the new log info to the end of the previous one, creating one utterly massive log file that I have to scroll all the way to the bottom of to see the current things I am working on.

How do I get this to go back to the old behavior of making a new log each time I close and relaunch things?

Thanks!