diff --git a/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/FileWatchManager.java b/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/FileWatchManager.java
index 6e4638df..b89911f0 100644
--- a/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/FileWatchManager.java
+++ b/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/FileWatchManager.java
@@ -107,7 +107,7 @@ private WatchedDirectory(Path dir, BiConsumer<Path, WatchEvent.Kind<Path>> liste
         }
 
         private void createRecursiveWatchers(Path dir) {
-            if (!Files.isDirectory(dir)) {
+            if (!Files.isDirectory(dir) || !Files.isReadable(dir)) {
                 return;
             }
 
diff --git a/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/LogManager.java b/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/LogManager.java
index 50e2cf23..236e31ad 100644
--- a/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/LogManager.java
+++ b/pdxu-app/src/main/java/com/crschnick/pdxu/app/core/LogManager.java
@@ -108,11 +108,15 @@ private void setLogLevels() {
             System.setProperty("org.slf4j.simpleLogger.log.com.crschnick.pdx_unlimiter.app.installation", "info");
         }
 
-        if (PdxuInstallation.getInstance().isNativeHookEnabled()) {
-            java.util.logging.Logger logger = java.util.logging.Logger.getLogger(GlobalScreen.class.getPackage().getName());
-            logger.setLevel(Level.OFF);
-            logger.setUseParentHandlers(false);
-            GlobalScreen.isNativeHookRegistered();
+        try {
+            if (PdxuInstallation.getInstance().isNativeHookEnabled()) {
+                java.util.logging.Logger logger = java.util.logging.Logger.getLogger(GlobalScreen.class.getPackage().getName());
+                logger.setLevel(Level.OFF);
+                logger.setUseParentHandlers(false);
+                GlobalScreen.isNativeHookRegistered();
+            }
+        } catch (Throwable t) {
+            t.printStackTrace();
         }
     }
 
diff --git a/pdxu-app/src/main/java/com/crschnick/pdxu/app/gui/GuiStyle.java b/pdxu-app/src/main/java/com/crschnick/pdxu/app/gui/GuiStyle.java
index 0f9d9450..e4c8b58a 100644
--- a/pdxu-app/src/main/java/com/crschnick/pdxu/app/gui/GuiStyle.java
+++ b/pdxu-app/src/main/java/com/crschnick/pdxu/app/gui/GuiStyle.java
@@ -74,6 +74,10 @@ public class GuiStyle {
     public static String CLASS_CLEAR = "clear-button";
 
     public static void addStylesheets(Scene scene) {
+        if (PdxuInstallation.getInstance() == null) {
+            return;
+        }
+
         try {
             Files.list(PdxuInstallation.getInstance().getResourceDir().resolve("style"))
                     .map(p -> p.toUri().toString())
@@ -84,6 +88,10 @@ public static void addStylesheets(Scene scene) {
     }
 
     public static void makeEmptyAlert(Scene scene) {
+        if (PdxuInstallation.getInstance() == null) {
+            return;
+        }
+
         scene.getStylesheets().add(PdxuInstallation.getInstance().getResourceDir().resolve("style")
                 .resolve("empty-alert.css").toUri().toString());
     }
diff --git a/pdxu-io/src/main/java/com/crschnick/pdxu/io/node/ValueNode.java b/pdxu-io/src/main/java/com/crschnick/pdxu/io/node/ValueNode.java
index c78f5472..e033997d 100644
--- a/pdxu-io/src/main/java/com/crschnick/pdxu/io/node/ValueNode.java
+++ b/pdxu-io/src/main/java/com/crschnick/pdxu/io/node/ValueNode.java
@@ -9,7 +9,7 @@ public final class ValueNode extends Node {
 
     private static final byte DOUBLE_QUOTE_CHAR = 34;
     private static final Pattern LONG = Pattern.compile("[+-]?[0-9]+");
-    private static final Pattern DOUBLE = Pattern.compile("[+-]?([0-9]+)\\.([0-9]+)");
+    private static final Pattern DOUBLE = Pattern.compile("[+-]?([0-9]+)[.,]([0-9]+)");
 
     private NodeContext context;
     private int scalarIndex;
@@ -111,7 +111,8 @@ public long getLong() {
 
     @Override
     public double getDouble() {
-        return Double.parseDouble(evaluateContent());
+        // Replaces decimal commas
+        return Double.parseDouble(evaluateContent().replaceAll(",", "."));
     }
 
     @Override