diff --git a/FileUtils.cs b/FileUtils.cs
--- a/FileUtils.cs
+++ b/FileUtils.cs
@@ -21,10 +21,9 @@ namespace DesertPaintLab
                 System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location),
                 "data", 
                 dirname);
-            if (!System.IO.Directory.Exists(dirPath))
+            if (System.IO.Directory.Exists(dirPath))
             {
-                // not found
-                dirPath = null;
+                return dirPath;
             }
             // try "Resources" in case this is a Mac app bundle
             dirPath = System.IO.Path.Combine(
@@ -44,10 +43,10 @@ namespace DesertPaintLab
                 System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location),
                 "Resources", "data",
                 dirname);
-            if (!System.IO.Directory.Exists(dirPath))
+            if (System.IO.Directory.Exists(dirPath))
             {
                 // not found
-                dirPath = null;
+                return dirPath;
             }
             dirPath = System.IO.Path.Combine(
                 System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location),