Added a replacement MP4 demuxer plug-in (in_mp4.dll) which is the start of replacing the remaining core playback plug-ins along with it allowing us to access YouTube streams again (which changed over to HTTPS at the start of 2019 & the original plug-in from 5.666 couldn't cope with it) as well as allowing you to only play the audio even if a video track is found without having to disable video support completely
Added buttons on the modern skin colour theme preferences tab to go to the previous & next colour themes in the list (user request)
Changed the non-skinned font used in the classic skin main window to use a normal style instead of the bold style based on feedback received
Changed the default render processing priority of the Waveform Seeker plug-in back to high & added an option to use a lower priority if needed
Changed the handling of the modern skin menus options along with adding some options on the Modern Skins -> Current Skin preferences tab to enable or disable whether those options are displayed in some of the menus (this might help workaround some reports of stability issues)
Fixed a crash seen when enabling the agent (but not directly related to it) as a side-effect of a change in the build 3996 for hooking more of the plug-ins
Fixed the wrong IP address being shown in some configurations on the Streaming Server preferences page when using a wireless connection (still needs some refinement)
Fixed the podcast view not always updating as expected on skin related changes
Fixed some of the issues seen with moving the classic skin main window & the song ticker not being shown (it now shows but there might be some flickering as I need to replace Winamp's main window drawing code or find a solution that'll temporarily better work with it's upscaling)
Fixed the menu on the Modern Skins -> Current Skin preferences tab being skinned when the preferences window is not set to be skinned
Fixed some files not being processed correctly with the ReplayGain plug-in due to an issue passing around data internally for the file
Fixed a crash when viewing some urls in the main playlist editor & artwork is set to be shown for the currently selected item in the artwork window
Fixed YouTube playback not working due to issues playing HTTPS based streams with the original MP4 demuxer plug-in from the 5.666 install
Fixed some MP4 based files not being processed via the Waveform Seeker plug-in
Fixed double-clicking in the main playlist editor not always working depending on the visible height of the window
Fixed the current modern skin colour theme preferences tab not using the expected colouring for the selection when skinned preferences is enabled
Fixed drag+dropping urls onto the main playlist editor not being added in the expected location especially under double-size mode
Updated libcurl (libcurl.dll) to 7.65.2 (17 July 2019)
Updated vgmstream (in_vgmstream.dll) to the latest Git commit from 14 Jul 2019