You specify a model estimating two classes or profiles, run it, harvest a bunch of information from the output, then write code for a parallel three-class model, run it, harvest, four-class..... and so on
The Helper works with your copy of Mplus. It will AUTOMATICALLY run multiple models for you, varying the number of classes, and saving the input and output files.
You put it in the same folder where your data is located.
Double click it.
And watch it go.