• Set the tool bar button arangement, size and text in Setup / Toolbar editor. Increase default button size.
• The tool bar editor allow you to edit the button bar layout. The function is available from the menu Setup / Tool bar editor.
• New performance options from menu File/Reset chart and options…
• New tool box function you can activate with the keys F1 to F8.
• Scripting functions and custom tool box capabilities.
• New representation for the Milky Way. This can be activated from the menu Setup / Display / Lines by unchecking “Milky Way - Line mode”.
• Updated Solar system information window with more functionallity
• Plot images for the main planetary satellites
• More color and label options
• Update the artificial satellites TLE files automatically.
• Option to add a crosshair to the chart center.
• Option to add the meridian line with any projection.
• Show comet and asteroid hourly motion in the detail window.
• Update download URL for asteroids and comets
• New observing list Tour function
• Add cursor or telescope position to observing list
• Add Tcp/Ip connection to the LX200 telescope interface.
• Use INDIstarter to manage the INDI server.
• New INDI control panel.

• OpenNGC replace NGC2000, it is now include with the base version
• Use official IAU star name
• The following catalog change require to install the new version with 4.0 in the file name from the catalog download section.
  • New version of GCVS and WDS catalog
  • New version of PGC/LEDA with 5 million galaxies
  • Add index to search planetary nebula by name
  • Add Sh2 and Barnard catalog
  • Update the pictures using better coordinates from OpenNGC

• Performance improvement with image display
• Artificial satellites TLE files can use .txt extension.
• Move some menu from File to View and Chart.
• Now the program scale the window correctly on high resolution screen. You can set the old behavior in Setup/General.
• No more store the program data location in the configuration file. If you need a non-standard location use the new command line option “–datadir=”.

For more details about the change you can look at the bug tracker change log and at the source code log