diff --git a/core/src/cn/harryh/arkpets/Const.java b/core/src/cn/harryh/arkpets/Const.java
index 8c62e4bd..75bb2ffd 100644
--- a/core/src/cn/harryh/arkpets/Const.java
+++ b/core/src/cn/harryh/arkpets/Const.java
@@ -36,9 +36,6 @@ public final class Const {
     public static final int behaviorBaseWeight      = 320;
     public static final int behaviorWeightLv1       = 32;
     public static final int behaviorWeightLv2       = 64;
-    public static final float behaviorMinTimeLv1    = 2.5f;
-    public static final float behaviorMinTimeLv2    = 5.0f;
-    public static final float behaviorMinTimeLv3    = 7.5f;
     public static final float droppedThreshold      = 10f;
 
     // Duration presets
@@ -53,7 +50,6 @@ public final class Const {
     // Paths of static files and internal files
     public static final String configExternal   = "ArkPetsConfig.json";
     public static final String configInternal   = "/ArkPetsConfigDefault.json";
-    public static final String iconFileIco      = "/icons/icon.ico";
     public static final String iconFilePng      = "/icons/icon.png";
     public static final String fontFileRegular  = "/fonts/SourceHanSansCN-Regular.otf";
     public static final String fontFileBold     = "/fonts/SourceHanSansCN-Bold.otf";
diff --git a/core/src/cn/harryh/arkpets/assets/AssetItemGroup.java b/core/src/cn/harryh/arkpets/assets/AssetItemGroup.java
index b1dc8c49..5bb469ee 100644
--- a/core/src/cn/harryh/arkpets/assets/AssetItemGroup.java
+++ b/core/src/cn/harryh/arkpets/assets/AssetItemGroup.java
@@ -5,7 +5,6 @@
 
 import cn.harryh.arkpets.assets.AssetItem.PropertyExtractor;
 
-import java.io.File;
 import java.util.*;
 import java.util.function.Predicate;
 
@@ -38,7 +37,7 @@ public AssetItemGroup() {
     }
 
     public AssetItemGroup searchByKeyWords(String keyWords) {
-        if (keyWords.isEmpty())
+        if (keyWords == null || keyWords.isEmpty())
             return this;
         String[] wordList = keyWords.split(" ");
         AssetItemGroup result = new AssetItemGroup();
@@ -61,11 +60,10 @@ public AssetItemGroup searchByKeyWords(String keyWords) {
     }
 
     public AssetItem searchByRelPath(String relPath) {
-        if (relPath.isEmpty())
+        if (relPath == null || relPath.isEmpty())
             return null;
-        String assetId = new File(relPath).getName();
         for (AssetItem asset : this)
-            if (asset.assetDir.getName().equalsIgnoreCase(assetId))
+            if (asset.getLocation().equalsIgnoreCase(relPath))
                 return asset;
         return null;
     }
@@ -126,8 +124,6 @@ public void removeDuplicated() {
     public static class FilterMode {
         public static final int MATCH_ANY           = 0b1;
         public static final int MATCH_REVERSE       = 0b10;
-        public static final int STRING_IGNORE_CASE  = 0b100;
-        public static final int STRING_PARTIAL      = 0b1000;
     }
 
     @Override
diff --git a/core/src/cn/harryh/arkpets/utils/Logger.java b/core/src/cn/harryh/arkpets/utils/Logger.java
index e38a894d..20af008c 100644
--- a/core/src/cn/harryh/arkpets/utils/Logger.java
+++ b/core/src/cn/harryh/arkpets/utils/Logger.java
@@ -8,8 +8,6 @@
 import org.apache.log4j.varia.LevelRangeFilter;
 
 import java.io.*;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.*;
@@ -97,10 +95,6 @@ public String getHeader() {
         };
     }
 
-    public static String getCurrentLogFilePath() {
-        return logFilePath;
-    }
-
     /** Sets a new log level.
      * @param level The new level.
      */
@@ -174,51 +168,7 @@ protected static String combine(String tag, String message) {
     }
 
 
-    public static class RealtimeInspector {
-        private BufferedReader reader;
-        private long fileLengthCache;
-
-        public RealtimeInspector(File file) {
-            initialize(file);
-        }
-
-        public RealtimeInspector(String filePath) {
-            initialize(new File(filePath));
-        }
-
-        public String[] getNewLines() {
-            ArrayList<String> newLines = new ArrayList<>();
-            if (isAvailable()) {
-                String line;
-                try {
-                    while ((line = reader.readLine()) != null)
-                        newLines.add(line);
-                } catch (IOException ignored) {
-                }
-            }
-            return newLines.toArray(new String[0]);
-        }
-
-        public boolean isAvailable() {
-            return reader != null;
-        }
-
-        private void initialize(File file) {
-            try {
-                if (file.exists() && file.canRead()) {
-                    reader = new BufferedReader(new FileReader(file));
-                    return;
-                }
-            } catch (IOException ignored) {
-            }
-            reader = null;
-        }
-    }
-
-
     protected static class Cleaner {
-        private static final SimpleDateFormat sdf = new SimpleDateFormat();
-
         public static void cleanByModifiedTime(String logPrefixName, int maxFileCount) {
             List<File> fileList = getAllLogs(logPrefixName);
             maxFileCount = Math.max(1, maxFileCount);
@@ -242,24 +192,6 @@ private static void deleteButKeep(List<File> fileList, int maxFileCount) {
             }
         }
 
-        @Deprecated
-        private static void sortByDateStr(String prefixName, List<File> fileList) {
-            fileList.sort((o1, o2) -> {
-                try {
-                    if (getDateStr(prefixName, o1).isEmpty())
-                        return 1;
-                    if (getDateStr(prefixName, o2).isEmpty())
-                        return -1;
-                    long t1 = sdf.parse(getDateStr(prefixName, o1)).getTime();
-                    long t2 = sdf.parse(getDateStr(prefixName, o2)).getTime();
-                    if (t1 != t2)
-                        return t1 > t2 ? 1 : -1;
-                } catch (ParseException ignored) {
-                }
-                return 0;
-            });
-        }
-
         private static void sortByModifiedTime(List<File> fileList) {
             if (fileList.isEmpty())
                 return;
@@ -272,10 +204,6 @@ private static void sortByModifiedTime(List<File> fileList) {
             });
         }
 
-        private static String getDateStr(String prefixName, File file) {
-            return file == null ? "" : file.getName().replaceAll(new File(prefixName).getName(), "");
-        }
-
         private static List<File> getAllLogs(String logPrefixName) {
             File file = new File(logPrefixName);
             File dir = file.getParentFile() == null ? new File(".") : file.getParentFile();
diff --git a/desktop/src/cn/harryh/arkpets/controllers/Homepage.java b/desktop/src/cn/harryh/arkpets/controllers/Homepage.java
index 88d6fee0..3293212a 100644
--- a/desktop/src/cn/harryh/arkpets/controllers/Homepage.java
+++ b/desktop/src/cn/harryh/arkpets/controllers/Homepage.java
@@ -174,7 +174,6 @@ public final class Homepage {
     private NoticeBar appVersionNotice;
     private NoticeBar diskFreeSpaceNotice;
     private NoticeBar datasetIncompatibleNotice;
-    private Logger.RealtimeInspector inspector = new Logger.RealtimeInspector(Logger.getCurrentLogFilePath());
 
     public Homepage() {
     }