Sagan Technology has updated Metro to v6.3.8.4.

Fixed in this version:

• Better AU and VST 2.4 compatibility.
• Dragging MIDI or audio data from certain plug-ins (namely Phatmatik Pro) was being ignored in some cases.
• Dragging MIDI or audio files from the finder or other applications could have resulted in a hang.
• Markers without any text are now ignored when Importing MIDI files.
• Errant Time signatures in MIDI files are now ignored. This may have caused a crash on Intel Macintoshes.
• Sometimes importing a MIDI file would not set the tracks length correctly.
• Clicking below the lowest drum in the graphic editor drum set view could have caused a crash.
• Changing the tempo via the section events window could cause problems with automation on audio tracks.
• Plug-in parameter values were not being endian swapped properly on Intel Macintoshes. If a plug-in has its 'Plug-in manages presets' contextual menu item checked, then plug-in parameters will now be ignored when the Metro file is loaded. This makes it possible to open saved 'PianoTeq' documents.
• Deleting the first plug-in in a chain of plug-ins could, in certain cases, make the track output silence.
• Automation would occasionally occur on a wrong track and the mixers contextual menu item 'store automation at start' could have caused a crash.
• Using the mixers contextual menu items for automation now correctly places audio automation on virtual instrument tracks.
• Muting mixer channels no longer sends MIDI volume of value 0 to virtual instruments since the audio output will be muted any way.
• Rearranging the order of a chain of plug-ins and then undoing it could result in a hang.
• Using the scale time dialog could have caused problems with automation on audio tracks.
• The maximum number of outputs a VST plug-in can have to be supported by Metro has been raised from 20 to 24.
• When auto-assigning a mixer channel and finding an unused one, Metro now resets the volume and pan of that channel.
• When starting Metro and with no visible windows, recent menu items would not appear.
• Video Thumbnails were broken in version 6.3.8.3 (full version only).