Can we convert our configs instead of "regenerate", or am I stuck at 2.0.3 for a while?

There is no way to regenerate from older version. Future versions will however. Shouldn't be too hard unless you individually overwrote each item. You're welcome to continue to use 2.0.3 but it has a staggering number of bugs, and some logic may cause unintended side effects. 3.0.0 and on will be much more adaptable.