I have just opened VSCode version 1.89.0 (April 2024) and it is opening 2 almost identical windows, one on each of my 2 screens. Normally I only get one view, like Screenshot 2. The difference can be seen in attached screenshots 1 and 2. All my javascript and associated files are in the JAVASCRIPT folder (arrowed). Everything above this is new to me.

I have tried restarting the computer, but no change.

This has only started this morning; not sure when 1.89.0 downloaded.
I am using a MacbookPro with Sonoma 14.4.1.
Advice would be appreciated.