david I followed the instructions, downloaded the core software and did the 'Update Bela'
was the update successful? Or did you get any error?
david Now the IDE is empty and shows a window with 'ERROR Can't open binary files'.
It seems that you dropped the zip file in there and it is now a file in your project. You can delete it.
Assuming the update was successful, you'd have to refresh the page at least once after the update in order to be able to drag-and-drop a zip file and have it interpreted as a project.
To see the version of your board you can run
grep v0 in the console at the bottom of the IDE.