roner
It took Jagex 6 months to get to the stage they could ban anyone, with the last program. Version 1-3 were very similar, but with V4 the entire bot will be different.
I don't know where you got your information, but nobody was banned the day the last version came out. Jagex did moniter people though, one guy used the bot 20+ hours each day the first couple of days, and J-Mods came to speak to him in-game on 3 separate occasions, before eventually banning him about two days after it came out, and shortly after banned quite a few others, but this was a long time ago, and an old version of the program and there was not a huge change from V2 to V3.
Remeber, in the final month using the most recent version, no players were banned. Logically, it should be the safest time to bot, ever, when the new program comes out - if you've read about what the update includes. If there are any sightings of J-Mods at the MTA though, you will be notified via the news system, but they don't go around banning just anyone.
There probably won't be many more people at the MTA than usual, but if you're not sure about the risks, you could wait for a few days/weeks and see how things pan out. It's up to you, but personally I don't think there is any risk at all, if you use the bot sensibly and responsibly.
