Since the update, the header line has changed slightly, so if Exmaps was relying on the old format, it won't work. The rest of the data is the same though.
Also I've noticed that if you are having trouble setting your clock, the telemetry files may end up with invalid (or out of sequence) timestamps. It looks like the ST-16 picks up the time from the GPS controller (my guess), so when you start flying you can get a minute or so in and the time 'resets' to GPS time + whatever zone it thinks you're in. For people currently in 'summer time' zones, that's probably an hour wrong. It also means that your telemetry jumps by an hour, which will confuse software trying to read it.
My advice is - don't fight the clock. It's a firmware bug so it's easiest just to live with a clock that's slightly wrong and wait for the next update to fix it.