These are all the changes since the last official release - 

DS 2.57
  *  Chat extension now deleted on install (using Discord now).
  *  UpdateProgressBar now has 'doevents' option to force ui update in v8 mode.
  *  Fixed issue with slow APK builds.
  *  Fixed issue with APK install just showing folder after build.
  *  Hybrid apps are now auto-detected (don't need cfg.Hybrid)
  *  Hybrid apps now removed from samples list, use UI plugin docs instead.
  *  Main DS App class changed to DsApp, so won't clash with Hybrid/Enjine apps.
  *  Added include() function for compatibility with Hybrid/Enjine apps.
  *  Updated Hybrid templates.
  *  Fixed crash with Notification listener during WhatsApp messages.

DS 2.56b1
  *  Hybrid components docs now visible after UI plugin install.
  *  Layout extension now automatically installed from UI plugin.
  *  Progress bar now shown when extracting assets at startup.

DS 2.55b1
  *  Added new 'CloudStore' tab to device IDE.
  *  Added new SSH/Device Terminal tab to device IDE.
  *  Switched device IDE 'Chat' tab to use Discord.
  *  Added new 'RemoteTerminal' SSH extension to wifi IDE.
  *  Move UI controls into an updatable internal DS plugin.
  *  Support ds:/* style paths in HTML elements (eg. ds:/Sys/app.js).
  *  The 'FontAwesome' option can now be used with app.CreateTabs.
  *  Changed wifi IDE right side tabs to show icons only.
  *  Changed node.Run() method to use separate VM contexts on each call.
  *  Changed FileDiff extension to full browser width.
  *  Fixed problem of ide.AddModule() only working once after DS restart.
  *  Added link to playstore unsubscribe page.
  *  APKBuilder now defaults to target API level 31.

DS 2.54b1
  *  Added 'YouTube Player' and 'Google Maps' samples.
  *  Added 'Card Flip' and 'Card Animation' samples.
  *  Added 'Shopping Cart' sample.
  *  Fixed bugs with device IDE image chooser.
  *  Added ext.displayWidth + ext.displayHeight to extensions API.
  *  Added ext.Play, ext.Stop, ext.Save to extensions API.
  *  Fixed bug causing notification listener to fail.
  *  Fixed bug with fine/coarse location in AABs.
  *  Made AAB builder more reliable (was often getting stuck at 99%)
  *  Added new WYSIWYG Layout extension to WiFi IDE (in experiments mode)
  *  Added version number to APK/AAB build output files.
  *  Added SPK auto-save feature when building APKs/AABs.
  *  Fixed problem with turkish characters in control callbacks.

DS 2.53b1
  *  Added new app.eventSource property.
  *  Fixed extraction issues with APK asset files containing 'dots'.
  *  Fixed mui.js not found bug when building Node APKs.
  *  Fixed build.json being ignored for AAB files.
  *  Fixed debug messages from NodeJS apps not readable.
  *  Improved !addmodule command to support versions (eg. mi...@1.6.0)
  *  Added new GitHub feature for premium users.

DS 2.52b1
  *  Added SetSpeed and SetPitch methods to MediaPlayer.
  *  Plugins can now contain sub-folders ('docs' sub-folder is removed in APK build).
  *  Added support for Cancel(id) or Cancel('*') in notification listener.
  *  JS errors from remote pages are now ignored for HTML and Hybrid apps.
  *  Multiple cfg.Hybrid app samples added when in 'experiments' mode.
  *  Re-organized app templates.

DS 2.51b1_p3
  *  Fixed app.SaveText() causing 'Storage' permission request.
  *  Added 'fillscreen' and 'fullscreen' options for Custom Dialogs.

DS 2.51b1_p2
  *  Updated app.ChooseFile() to support GoogleDrive,OneDrive and DropBox.
  *  Added 'nodownload' option to app.ChooseFile (just returns uri, no downloading of files).
  *  Added 'persist' option to app.ChooseFile (persists file permission after reboot).
  *  Added 'pretty' option to app.Uri2Path (returns DS style paths).
  *  AddPermission 'alert' bug fixed (introduced in 2.51b1).

DS 2.51b1
  *  Fixed playback of transparent animated gifs in Image control.
  *  APKBuilder is no longer sensitive to spaces around brackets of LoadPlugin call.
  *  List.OnTouch() event now returns unicode chars with correct upper case hex codes.
  *  Transparent apps now startup with zero size (to prevent black flash).
  *  Added cfg.Legacy option to enable various legacy transparent app behaviour.
  *  Added app.UpdateUI() method for forcing UI drawing during heavy processing.
  *  Enabled 3rd party cookies by default for webviews, fetch and xmlHttpRequest.
  *  Fixed broken app.SetAlarm() method.
  *  app.ListFolder() now supports SAF (can list outside scoped storage).
  *  Added app.ListPermissions and app.RemovePermissions.

DS 2.51a1
  *  Added support for /Internal/* and /External/* SAF paths.
  *  app.GetPermission() now supports 'external' and 'internal' keywords.
  *  Replaced 'Sdcard Access' sample with 'Storage Access' sample.
  *  Improved permissions detection for file:/ / / android_asset paths.
  *  Fixed 'Share SPK' for scoped storage devices.
  *  Fixed app.SendFile, app.SendImage, app.SendMail for scoped storage devices.
  *  Added QUERY_ALL_PACKAGES permission to X version.
  *  Removed default params from edit/mui.js (older webviews don't not like it)
  *  Added web.Func(name,args...) for easy calling of functions defined in a WebView.
  *  Added app.Func(name,args...) for easy calling of main script functions from a WebView.
  *  app.SimulateTouch() now copes with lower case keywords.
  *  Fixed 'atob' issue with console logging in NodeJS apps.
  *  Added new GetDocumentFile() method to Plugin parent object.
  *  Added new app.GetRouterAddress() method.
  *  Added tabs.SetTextSize(size,mode) method.
  *  Added cfg.Fast mode for premium users (3x faster apps!)
  *  Added XMLHttpRequest polyfill for Fast mode.

DS 2.50p1
  *  Added 'Query Images' and 'Query Videos' samples.
  *  Fixed crash when building APKs/AABs for Html apps.