I was thinking about doing that. I am going to conduct another run maybe Sunday evening since I didn’t have a totally quiet environment during my last couple of measurements thanks to the cooling fan for the instrument cluster display kicking on (smh).I'm also rather confused by all this. I realize it's a big ask, but would anybody who has given this technique a try be willing to take some screenshots to illustrate exactly what you're doing?
If by chance you are confused about what the OP meant by ungrouping target curves in the DL software like I was, the manual explains exactly how to do this. I searched ‘group’ in the pdf file and I think it is the 2nd entry that takes you to the right spot. Once I got through that step, I was able to follow the rest of OP’s instructions.