Switch default build back to jupyter notebook

My Binder badges now load a jupyter lab instead of a jupyter notebook which breaks the autorun, and some hide cell / run cell buttons. I know I can delete lab to get it back to a jupyter notebook but how do I default it to open a jupyter nuotebook.

Badges:

Please see the discussion in this thread Classic notebook instead of jupyterlab on mybinder.org

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Thanks! I tried searching it but was unsuccessful. That is exactly what I needed!