This is based on the Tikhonov regularisation method. The original FORTRAN has been supplied by the Computer Physics Communication program library http://www.cpc.cs.qub.ac.uk/ of the University of Belfast. This code has been converted by us to the Dynamic Link Library (DLL) for the Windows environment. The idea of the program was published originally by: S.W. Provencher, Comp. Phys. Commun. 27, 213 (1982); 27, 229 (1982).