Isolating Subset of Trackmate Data

I am using ‘Manual Tracking with TrackMate’ to analyze images from an assay that involves a treatment shift in the middle of the assay. I am hoping to compare the average velocity of tracks before and after the treatment shift in the middle.

I know I could split the time series in two, and analyze each separately with TrackMate, then compare the output datasets

I could also export all of the ‘Spots in Tracks statistics output’ from the entire time series together, and then build my own pipeline in R to reconstruct the track data (velocities) and split it in half

However I am trying to avoid both of these options. Is there a way to export the ‘Track Statistics’ from Trackmate for only a subset of time points?