I'm using DVDpedia v5.3.1 (purchased directly from Bruji) under Mac OS X 10.10, and I've self-inflicted some corruption somewhere whereby I can no longer activate DVDpedia (it just bounces in the Dock, and I must Force Quit in order to stop the attempted loading).
I attempted deleting the Preferences plist file (leaving the plist lockfile in situ), but upon initiating DVDpedia, it simply bounces in the Dock. Finder shows it not responding; so I can only Force Quit.

...Upon revisiting my Preferences folder, I do not see a regenerated, "com.bruji.dvdpedia.plist" file. Is this what's keeping the app from opening to the default, database location on my Mac?
I have been previously, without any real issues, syncing my desktop DVDpedia with my iOS devices via Dropbox. My iOS devices (iPhone 6 & iPad Air 2) are now running v8.1. Yesterday (11/9) when I opened DVDpedia on my iPad, I found all the Album Covers were missing. ...After reading the procedure to reintroduce the covers (not very closely), I incorrectly did something that has now caused my issue.
As I've been using Dropbox, all my current DVDpedia files, except my Backup zip file, are in Dropbox; and since I can not open my desktop DVDpedia app, I do not know the procedure to essentially re-install my Backup database.

[My DVDpedia Backup.zip file, I believe to a good one as it precedes my foolishness from yesterday, is located in my Application Support - DVDpedia folder on my Mac.]
Also when I look at my Dropbox DVDpedia folder, I now see a "database.dvdpd.migrationdestination_xxxx" file I don't recall previously seeing. Also, the "Database.dvdpd" file (in Dropbox) has a Modified Date I believe to now be corrupted. Anyway, I'm stuck as to what is the correct procedure to undue my self-inflicted problem.
Please outline how to proceed. Thank you.