Hey man, great tool, I use it every time with pretty much all my sims!
I do have one issue with assetto corsa though, sometimes it doesn't save the .csv file for the first lap of a race, I'm trying to identify the problem by doing further testing, I think it only happens with non Kunos tracks, but I don't recall this happening in older versions so it might be a new bug.
oh and by the way, a similar thing happens with the point to point tracks in project cars 2, like california highway or azure coast, the telemetry data is visible while driving but it doesn't save to .csv at the end of the race.
This has been fixed in the upcoming 10.7, which will be out at the same time as the F1 2021 is released.
If you want to access the fixed version earlier, please PM me and I will send you link to the beta.
Cheers.