Software for 2015 Unitron Moxi Fit 600

I have 5 yr old Unitron Moxi Fit 600 HAs that I would like to try tweaking myself. . Can someone please give me the correct information?

I have the HiPro programmer and the correct cables, just not sure which version of the software I need.

Thanks!

You can use trueFit 3.5

Thanks so much for the quick reply!