Average is a program to merge single-crystal X-ray intensity, with options to reject outliers from sets of symmetry-equivalent data, including the effects of "diamond dips" in diamond-anvil cell data. It can be used for data collected with either an area detector or a point detector. It will read and write Shelx hkl and Rfine format datafiles. Download a zip archive that includes the program, the users guide and example datafiles. Then extract the pdf file of the manual which contains further installation instructions. If you download and use Average, please register with us by e-mail, so that we can inform you of new releases and updates of the software. Last Update: Version 2.22 (October 2011). If you are using an older version, please update to this version.