Version 3.0
    First of distributed
Version 3.1
  - New "Conic" sky projection added
  - New button "Rising/Setting" added into the window of object information
  - New "Find star" dialog box added to search a star by it's name
  - New menu item added for quick view of information of an additional objects
  - While parameters of a fixed object are being changed, you may select the epoch
    of it's coordinaties
  - Some small interface changes are implemented
  - Some bugs are corrected (including erroneous work with dates before 1900)
  
Version 3.11
  - "Conic" projection is slightly changed

Version 4.0
  - Constellation lines added
  - 110 deep-sky objects (galaxies, nebulae, star clusters) added
  - Calculation of star proper motions added
  - Background color may be changed during sunset/sunrise
  - Autorotation mode added
  - Interface changed essentially
  - Program can be installed with full registration and possibility of
    uninstallation
  - Improved speed of catalog loading
  - File of settings made as standard ini-file
  - Maximum zoom 600%
  - Time zone may have a fractional part
  - Many impovements introduced in program code
  - Few other small interface changes implemented
  - Few small bugs corrected

Version 4.1
  - Coordinate grid added
  - List of cities added (Longitude, Latitude and Time Zone)
  - Some interface changes (selection North/South latitude, East/West
    Longitude, etc. instead of positive/negative values)
  - Proper names of bright stars may be drawn directly on the sky image
  - Moon image is more noticeable now
  - Using of B.C. years corrected: now "zero" year is absent and negative
    values correspond to B.C. years
  - Bug corrected: possibility of non-coordination between printed and visible
    on screen sky regions
  - Some other small bugs are corrected