We're aware that as many Life Cycle users use the app over a longer period of time, their living situation changes. You graduate, or you go back to school, or something else. Right now, you can't change your default choice from School to Work or Work to School, and we're going to implement a fix that allows you do to that (or rather, run both categories in parallell).
Until then, we suggest that you create a custom category and name if after your preference, and track your time through that category. You won't get commutes, since those are hard-wired to your default choice when you launched the app, but you still get all those events tracked, only separately now and not in the commute slice.