diff --git a/tools/cooja/java/se/sics/cooja/GUI.java b/tools/cooja/java/se/sics/cooja/GUI.java
index 2d57a42cc..1883ba2da 100644
--- a/tools/cooja/java/se/sics/cooja/GUI.java
+++ b/tools/cooja/java/se/sics/cooja/GUI.java
@@ -1556,6 +1556,9 @@ public class GUI extends Observable {
     "MOTETYPES");
     if (moteTypeClassNames != null) {
       for (String moteTypeClassName : moteTypeClassNames) {
+        if (moteTypeClassName.trim().isEmpty()) {
+          continue;
+        }
         Class<? extends MoteType> moteTypeClass = tryLoadClass(this,
             MoteType.class, moteTypeClassName);
 
@@ -4260,6 +4263,22 @@ public class GUI extends Observable {
           id += "/..";
         }
       }
+      if (!fileCanonical.startsWith(configCanonical)) {
+        /* SPECIAL CASE: Allow two parent directories */
+        File parent = new File(configCanonical).getParentFile();
+        if (parent != null) {
+          configCanonical = parent.getCanonicalPath();
+          id += "/..";
+        }
+      }
+      if (!fileCanonical.startsWith(configCanonical)) {
+        /* SPECIAL CASE: Allow three parent directories */
+        File parent = new File(configCanonical).getParentFile();
+        if (parent != null) {
+          configCanonical = parent.getCanonicalPath();
+          id += "/..";
+        }
+      }
       if (!fileCanonical.startsWith(configCanonical)) {
         /* File is not in a config subdirectory */
         /*logger.info("File is not in a config subdirectory: " + file.getAbsolutePath());*/