Get it here.
6.1.7 is a small followup release to 6.1.6, which came out about a week ago. Some users were seeing issues where entries and journals would duplicate themselves while using MacJournal. This apparently was due to how MacJournal reacts to the system it is running on telling it that its data changed outside of MacJournal. This release tries to address this in a few different way. First, it improves the strategy used to merge the data from disk to eliminate cases where it might duplicate something. The second is to stop paying attention to these messages from the system in cases where it doesn't make much sense. If the document isn't on something like Dropbox, these notifications are likely spurious (and may be a bug in the operating system itself) and would just cause unnecessary work for MacJournal. This is now turned off for most cases and I will look into perhaps turning this general ability back on in the future after testing with future versions of the operating system.
Please let me know if you have any issues with this soon as I expect the final release to come out later this week,