Cockos has updated REAPER to v4.21.

Changes:

• Control surfaces:
  • Fixed solo following solo-in-place preference (broken in 4.20).
  • Fixed possible crash in certain instances (AlphaTrack, etc).
  • Improved AlphaTrack automation behavior with pan knob.
• OSC:
  • Fixed initial FX wet/dry feedback.
  • Support for opening/closing FX UI windows.
• Recording:
  • Fixed item end alignment when recording looped in loop selection.
  • When using MIDI input, input FX, and recording audio, improved latency calculation.
• Actions: added action to insert time and paste items.
• Cues: ensure correct rendering of .wav cues that belong at the exact start/end of the file.
• MIDI: fixed MIDI pools when opening multiple copies of the same project in different project tabs.
• Project bay: fixed autoretain of deleted items in certain instances.
• ReaScript/API: export added extension API functions to ReaScript function table.
• Transient detection: navigation by transient now is view independent, option for old behavior.