Thanks for the links and suggestions. I've got it working in PlatformIO for now (fairly straightforward install), so I'll probably continue with that, but if that doesn't work out, I will give these options a try. Thanks!

I have installed ESP-IDF as a VSCode extension. When I click on New Project, it gives the following error...

The "file" argument must be of type string. Received undefined

I've done the "Doctor command", and everything in the list shows undefined.

Here's an extract ...