Hi -- the MIDI 2 Scope application is not yet (April 2020) available for download, as the MMA is still working out some details before that happens. I expect that the release of this and other developer tools including the MIDI-CI workbench will be publicized here.
MIDI Scope is currently only available on the github for corporate members of the MIDI Association.
We are planning on discussing this in depth in an MIDI Association annual planning session open to all MIDI Association corporate members scheduled for the beginning of February.
As an organization we would still want to have some control over access to our Github which would include registration by anyone accessing it. Also Special Interest groups like the IASIG sometimes have a small membership fee to cover administrative costs.