By default the plots displayed after a multiple simulation (with the .step directive) will plot all the simulation on the same chart, with traces of different colors for each step. I know how to select only certain steps, but this is cumbersome and time consuming. What I want is to have a slider, and when dragging the slider to select a different .step simulation from the results. No data interpolation, just to switch the plotted set from the slider.
I want something that can change the plots like this, but with a slider to control the steps of the animation:

I crave for something like this almost every time I study something using LTspice, so I suspect others wanted a feature like that, too. I could write my own program, but chances are somebody already did a tool to do just that.
Any ready made post-processor programs for LTspice simulation results? (google doesn't show any)