This change allows the user to modify the number of parameters for which the MCMC convergence diagnostics are shown. The user needs to set a value for options_.nparMCMCdisp in the mod file before the estimation command for an arbitrary number of parameters to be shown. The code defaults to 3 if no input is supplied. The code also defaults to 3 if the user - for some reason - enters the value 0, as otherwise the code gets stuck in an infinite loop that keeps on opening new figure objects but never plotting anything.