  In this report we introduce a \texttt{Matlab} toolbox for the regularization
of descriptor systems. We apply it, in particular, for systems resulting from
the generalized realization procedure of \cite{MayA07}, which generates, via
rational interpolation techniques, a linear \emph{descriptor system} from
interpolation data. The resulting system needs to be regularized to make it
feasible for the use in simulation, optimization, and control. This process is
called \emph{regularization}
