How do I update JOSM to OpenWebStart?

Hello, JOSM prompts me to update to OpenWebStart, I downloaded OpenWebStart and installed but JOSM still prompts to update to OpenWebStart. Is there something I need to do to update? Have I already updated and just need to tell it to not popup with the prompt anymore? If so is there anyway to confirm that the update processed properly?
I see this person had the same problem a few years ago but never got any answer.
Below is the screen that prompts me to update to OpenWebStart and the second is a screenshot of JOSM and what happens if I don’t do anything at the update dialogue screen.


On the josm install page I found these instructions which might help you.

Uninstalling Oracle’s Java would also probably work, but might break other things on your system.