This release includes several new functions focused on exploring models of discrete trait evolution. These methods allow us to understand how rate heterogeneity is distributed across a phylogeny. This version also includes many updates to other functions. Functions in this package are designed for analysis of continuous traits influencing discrete states, performing ABBA/BABA tests of introgression, evaluating and measuring rate heterogeneity in Mk models, calculating probabilities of sex chromosome to autosome fusions, counting topologies, working with sequence alignments, etc.