Fixed prefs copy.

Author: Edward Smith

Branch-SDK/Branch-SDK/BNCPreferenceHelper.m

@@ -729,7 +729,7 @@ + (NSURL*) URLForPrefsFile {
 
 + (void) moveOldPrefsFile {
     NSURL *oldURL = [NSURL fileURLWithPath:self.prefsFile_deprecated];
-    NSURL *newURL = [self URLForBranchDirectory];
+    NSURL *newURL = [self URLForPrefsFile];
 
     NSError *error = nil;
     [[NSFileManager defaultManager]