Just downloaded the IDE 2.0 (I want to use it with an ESP32 and was told I need v2).
I see that it says for Windows 10. I am trying to run it on Win7-64.
When I run it I just get a black window with title bar.
Since I have never used the Arduino software before I have no idea what to expect or how it should look, but I suspect a black screen is not what is expected.
I'm not sure if it is something like a video driver issue, a missing prerequisite (.net??), or just plain not compatible with Win7.
That is incorrect. The 1.8.x Arduino IDE works just fine with ESP32. The majority of the ESP32 Arduino users are likely still using Arduino IDE 1.8.15 or earlier.
Something like this:
As someone who has never used the Arduino software before, you should not be using the experimental beta release of Arduino IDE 2.x. This is intended to be used only for beta testing.