RIQAS is significantly improved and is backward compatible. It requires a 32-bit system such as Microsoft Windows© '95 or later.
Some of the many new features include;

• Supports current NIST-ICSD structure database
• Greatly improved structure-viewer
• Access recent files in the file open dialog
• Structure database backup and restore

• Refinement parameter monitor
  
• Undo last refinement
  
• 3D structure viewing
  
• Atomic site recognition
• Easy parameter linking
• Internal 2Theta reference
• Micro-absorption correction (Brindley correction)
• User specified parameter limits
• Improved user interface
  
• Reflection monitor
• Quantitative result monitor
• Quick notes
• New startup options
• Refine up to 30 phases with or without internal standard
• Support ICSD (FIZ) crystal structure data retrieval
  
• Import crystal structure data in GSAS format
• Support the MDI crystal structure data file format (*.csf)