Aegisub 3.1.3 Changelog

Return a rgba string for coloralpha lua controls (rather than just rgb)
Update to moonscript 0.2.5
Fix memory leaks when automation errors occur
Add an error check for trying to interact with an expired subtitles object rather than just crashing

Fix a crash when deleting lines with audio open
Sort the actor and effect dropdown lists (#1715)
Fix crash on startup when the config file can’t be written
Fix some performance issues with very large selections
Fix some cases where the taskbar progress indicator would get stuck at nearly complete
Speed up passing subtitles to libass a bit
Fontconfig reads installed fonts from the registry on Windows, adding support for fonts installed via font managers to the fonts collector