Binder and choice of jupyterlab or jupyter

Apologies for the narrow question.

We use binder (and gesis) to host a set of notebooks for a calculus class. It seems the default interface has changed since August to jupyterlab and now plotly() graphics are not displaying, though gr() ones do (through Plots).

Is there a configuration to the repository that I can make to have the original jupyter interface load (for which I’m hopeful the graphics will work as before.)