Most of the episodes I saw were from the 1980s-early 90s. I can't remember much before the time that PBS had stopped showing the pre-1979 episodes, so the oldest I remember seeing was about 1979-80.
However, after that, I thought Rogers had stopped taping around 1993, because whenever I would catch it on in the late 1990s, our station never seemed to show anything more recent than that. But later on I do remember seeing an episode from 1997 and the one where he went to see the group Stomp. It wasn't long after that when I learned that they were in fact still producing episodes during those years and would soon air the final one in 2001.
I don't recall the computer episode and was surprised to see photos of it on the neighborhood archive. I never thought they ever discussed the webpage on the show apart from having the address during the closing credits. It doesn't really bother me though, they were just trying to keep up with the new internet age, so I guess Rogers wanted to relate the webpage to his show. I remember Hula Mouse but never knew he had anything to do with the computer.