There have been 7 software revisions for the F-Pulse/TekPoint. V1.0 (Dec 2017) had the lock-up problem but did NOT have the Turbo mode. V1.1 (Mar 2018) fixed the lock-up problem. V2.0 (Apr 2018) added Turbo mode and had a few other changes. V3.0 (Nov 2019) changed the low batt warning.
Turbo mode has no effect whatsoever on sensitivity, it is just a faster way to turn on/off the pinpointer. All of these versions have 9 mode settings: vibe-only, beep-only, and vibe+beep, each with 3 sensitivity levels. All versions through 3.0 should have the same sensitivity as that part of the code was not altered.
V4.0 (Aug 2021) removed the Turbo mode and some other options and changed the sens modes so that salt is better rejected. It also removed the beep-only mode so now there are 6 mode settings, but highest sensitivity is still there. V4.1 & V4.2 were changes to help production.