Date	Version	Revision
Feb 20, 2002	1.0	MemExp 1.0 released [1].
Mar 15, 2002	1.1	Fixed bug causing crash when NDIST=1 and NBASLN>0
Mar 27, 2002	1.2	Fixed bug involving INSIG = 0. Fixed bug involving first time value = 0. Improved y-axis numbering in PostScript output. Modified plotting of autocorrelation of residuals (x values are now equally spaced).
Nov 1, 2002	2.0	Improved the differential blurring of f into F for kinetics involving overlapping exponential and distributed phases [2]. More than 9 rows of plots in PostScript output allowed (see PLOTS). Additional improvements to graphics. Additional normalization options (see D0OPT). The required input has changed slightly from version 1.2. Discarded input parameters: SYNDAT, NFUNC0. New input parameters: D0OPT, EXPMN2, PLOTS, FSCALE, FIXSUM, WRNORM, SPIKE3, DAREA, NSPIKE, MNSPK, HOWSPK, DARSPK, FWSPK, DCHI2C
July 22, 2004	3.0	Poisson noise treated rigorously. Deconvolution of measured instrument response supported. Light-scattering correction added. The required input has changed slightly from version 2.0. IGNORE is now an integer (0, 1, or 2). New input parameters: RESPON, EPSIRF, IRSMOTH, LTSCAT.
Jan 23, 2007	3.0	Executable built for Mac OS X.
June 13, 2012	4.0	New, easy-to-use simple and auto modes. New option for adapting prior model from kinetics (setting IBIGF=3) can suppress artifacts and improve peak positions in the lifetime distribution. See: P.J. Steinbach, Filtering artifacts from lifetime distributions when maximizing entropy using a bootstrapped model, Analytical Biochemistry 427 (2012) 102-105.