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Ensure all files from the cabinet are moved into this folder to enable full functionality like curve fitting.

: Since the original developer's official site is no longer active, the software is commonly hosted on institutional archives or community forums: University of Warwick Archive (Includes manual and ZIP). Washington State University (WSU) Archive (Direct download instructions). Software Informer - XPSPeak 4.1 System Compatibility xpspeak41 software download

Supports common methods such as Shirley, linear, and Tougaard backgrounds. Ensure all files from the cabinet are moved