Hello, just confirming this update solved my issue
midi, colors and everything else works normally.
Thank you for the quick fix
We are aware of some issues affecting ATOM after the Studio One 4.5 update and are working on a fix.
Until we release the fix, you can temporarily work around these issues by disabling and immediately re-enabling Input Monitoring of the selected track—just click the little speaker icon next to the record enable button in the Arranger or Console twice.