What is "ripple bandwidth" in filter terminology?
For a Butterworth filter, the 'bandwidth' is always the frequency at which the response is -3dB of its maximum value.

For a Cheby filter, where you choose the depth of ripple for your application, most filter design packages (I've not used Elsie, but it seems the same as others) define the bandwidth of a lowpass filter as the highest frequency at which the response is the ripple depth below its maximum value.

This makes a lot of sense, as if you specify a passband ripple, this definition of bandwidth is the range of frequencies for which the passband response is in specification. You can always find out what the -3dB bandwidth is by analysis of the response.