We still need Studio 9

Although I love Studio 13, we still need access to Studio 9. We have so many course built in 9 that need just a little updating occasionally. Is there any way to have access to both? This is critical! If I cannot have both can I go back to 9? I don't like giving up 13 but it's requires too much time to redo every course we already have.

Thank you!

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