Record merging is an area where personal goals and opinions influence greatly the outcome. This version is different from 0.7 in a number of places. First, it is update to work with current PGV versions (4.3.x). Second, it tries to import sources creating them if necessary or reusing already existing sources in the destination GEDCOM. Third, facts differing only in source references are merged together importing new source references in the process and trying not to duplicate them (process that is fragile and may end up in duplication if a source reference is edited in the destination GEDCOM and then a remerge is done). Fourth, it does not stop after processing merging a set of linked registers (this is useful if you want to merge a set of records from a FamilySearch or Vital Record Index search).
I have not used it lately beyond making sure it at least starts running on current versions. Make sure you backup all your data before running this.