Brian,
I did follow your video and was unable to repeat what you did. I HAD to start the race and I HAD to check the chip start option. I repeated many times in the same instance of ART and got nowhere.
Yes, I am wanting to import (alterations to) chip start times during the triathlon event. While runners are finishing their 3rd discipline there are still those about to start their swim. With athletes choosing not to start the event and the organisers wanting to maximise pool use, they will permit later athletes, if they arrive early enough, to start their swim early. Hence the need to change chip start times. Be aware that an athlete intending to start right at the end of the event who is actually allowed to start at the beginning of the event could arrive at the Finish line before the original swim start time ! So a need to update their chip start time is imperative.
My intention is indeed to import chip start times for the whole event prior to race day.
I have never needed to consider re-import a TAG file due to a major issue. What I would expect to use is my own named TAG file, eg “Triathlon chip start TAG file.CSV”, which has as many TRUE entries in it as there are athletes in the event. As athletes do not start at their intended start time, I would want to amend my TAG file and re-import after, say, a dozen changes at a time.
Your comment about new entrants is understood, but usually, for a triathlon, new additions are not permitted.