Works great until I close 'JShell Easy' editor, then stops working

[MikeTheGreat]

It looks good with 'snippets.jsh' tiled on the left and the 'JShell Easy' editor tiled onto the right.

But, when I (accidentally) close the 'JShell Easy' editor / window panel then it stops working (I can type into snippets.jsh, but there's no output)

After that it's not clear how to get that editor/window back, and doing the Command Palette -> JShell Easy Start Session I get an error message:

Desired result: Either I can re-open the 'results' window, or I can start a new session (so that I can keep adding code to snippets.jsh and see the results as I do so)