Automating Nonlinear Regression

I'm working with a lot of graphs (over 1000 total) that need to be individually regressed with the converged variables extracted and the graphs saved. I'm currently doing this in SigmaPlot but unsure if this is the best method? I have no idea how to automate this process as I'm not much of a programmer myself. Any tips or ideas would be extremely helpful!

I've attached the logistic equation I'm regressing against.