Persist keys to db. Necessary in the event that download succeeds then decrypt fails.

ApplicationServices/LibraryCommands.cs

@@ -119,5 +119,13 @@ namespace ApplicationServices
 				throw;
 			}
 		}
+
+		// I hate how unintuitive this is to use/remember. Will hopefully be cleaned up in a future comprehensive data strategy overhaul
+		public static void UpdateBook(Book book)
+		{
+			using var context = DbContexts.GetContext();
+			context.Update(book);
+			context.SaveChanges();
+		}
 	}
 }

FileLiberator/DownloadBook.cs

@@ -51,6 +51,8 @@ namespace FileLiberator
 
 			libraryBook.Book.AudibleKey = dlLic.AudibleKey;
 			libraryBook.Book.AudibleIV = dlLic.AudibleIV;
+			// persist changes
+			ApplicationServices.LibraryCommands.UpdateBook(libraryBook.Book);
 
 			var client = new HttpClient();
 			client.DefaultRequestHeaders.Add("User-Agent", Resources.UserAgent);