diff --git a/app/build.gradle b/app/build.gradle
index 60046f8..95b107e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,7 +4,7 @@ ext {
     // App version in semver format (https://semver.org/)
     versionMajor = 0
     versionMinor = 4
-    versionPatch = 3
+    versionPatch = 4
 }
 
 project.version = "${versionMajor}.${versionMinor}.${versionPatch}"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 0fbe860..2cfbc95 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -7,10 +7,11 @@
     <application
         android:icon="@drawable/icon"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme">
+        android:theme="@style/AppTheme"
+        android:requestLegacyExternalStorage="true">
         <activity android:label="@string/app_name" android:name=".ui.BkEmuActivity"
                 android:windowSoftInputMode="adjustResize"
-                android:launchMode= "singleTask">
+                android:launchMode="singleTask">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
diff --git a/app/src/main/java/su/comp/bk/ui/BkEmuFileDialog.java b/app/src/main/java/su/comp/bk/ui/BkEmuFileDialog.java
index 5452e31..d3c26a4 100644
--- a/app/src/main/java/su/comp/bk/ui/BkEmuFileDialog.java
+++ b/app/src/main/java/su/comp/bk/ui/BkEmuFileDialog.java
@@ -341,6 +341,7 @@ private static String getFormatFilterString(String[] formatFilterArray) {
     }
 
     protected SimpleAdapter getDirList(final String dirPath) {
+        File[] files = null;
         currentDirElements = new ArrayList<>();
         ArrayList<HashMap<String, Object>> dirItems = new ArrayList<>();
 
@@ -348,23 +349,26 @@ protected SimpleAdapter getDirList(final String dirPath) {
         if (!f.isDirectory()) {
             f = f.getParentFile();
         }
-        String currentPath = f.getPath();
-        File[] files = f.listFiles();
-        if (files == null) {
-            currentPath = Environment.getExternalStorageDirectory().getPath();
-            f = new File(currentPath);
-            files = f.listFiles();
+        if (!isDirectoryReadable(f)) {
+            f = Environment.getExternalStorageDirectory();
+        }
+        if (!isDirectoryReadable(f)) {
+            f = getApplicationContext().getExternalFilesDir(null);
         }
-        pushDirToHistory(currentPath);
 
-        if (!currentPath.equals(ROOT_PATH)) {
-            if (isDirectoryReadable(ROOT_PATH)) {
-                addDirItem(dirItems, ROOT_PATH, R.drawable.ic_folder_white_24dp);
-                currentDirElements.add(ROOT_PATH);
-            }
-            if (isDirectoryReadable(f.getParent())) {
-                addDirItem(dirItems, "../", R.drawable.ic_folder_white_24dp);
-                currentDirElements.add(f.getParent());
+        if (f != null) {
+            files = f.listFiles();
+            String currentPath = f.getPath();
+            pushDirToHistory(currentPath);
+            if (!currentPath.equals(ROOT_PATH)) {
+                if (isDirectoryReadable(ROOT_PATH)) {
+                    addDirItem(dirItems, ROOT_PATH, R.drawable.ic_folder_white_24dp);
+                    currentDirElements.add(ROOT_PATH);
+                }
+                if (isDirectoryReadable(f.getParent())) {
+                    addDirItem(dirItems, "../", R.drawable.ic_folder_white_24dp);
+                    currentDirElements.add(f.getParent());
+                }
             }
         }
 
@@ -372,22 +376,24 @@ protected SimpleAdapter getDirList(final String dirPath) {
         TreeMap<String, String> dirsPathMap = new TreeMap<>();
         TreeMap<String, String> filesMap = new TreeMap<>();
         TreeMap<String, String> filesPathMap = new TreeMap<>();
-        for (File file : files) {
-            if (file.isDirectory()) {
-                String dirName = file.getName();
-                dirsMap.put(dirName, dirName);
-                dirsPathMap.put(dirName, file.getPath());
-            } else {
-                final String fileName = file.getName();
-                if (formatFilter != null) {
-                    boolean isFormatMatched = isFileNameFormatMatched(fileName, formatFilter);
-                    if (isFormatMatched) {
+        if (files != null) {
+            for (File file : files) {
+                if (file.isDirectory()) {
+                    String dirName = file.getName();
+                    dirsMap.put(dirName, dirName);
+                    dirsPathMap.put(dirName, file.getPath());
+                } else {
+                    final String fileName = file.getName();
+                    if (formatFilter != null) {
+                        boolean isFormatMatched = isFileNameFormatMatched(fileName, formatFilter);
+                        if (isFormatMatched) {
+                            filesMap.put(fileName, fileName);
+                            filesPathMap.put(fileName, file.getPath());
+                        }
+                    } else {
                         filesMap.put(fileName, fileName);
                         filesPathMap.put(fileName, file.getPath());
                     }
-                } else {
-                    filesMap.put(fileName, fileName);
-                    filesPathMap.put(fileName, file.getPath());
                 }
             }
         }
@@ -420,7 +426,13 @@ private static boolean isDirectoryReadable(String dirName) {
         if (dirName == null) {
             return false;
         }
-        File dir = new File(dirName);
+        return isDirectoryReadable(new File(dirName));
+    }
+
+    private static boolean isDirectoryReadable(File dir) {
+        if (dir == null) {
+            return false;
+        }
         return dir.exists() && dir.listFiles() != null;
     }
 
diff --git a/app/src/main/res/raw-ru/changelog_data.xml b/app/src/main/res/raw-ru/changelog_data.xml
index 4674786..1a0a0e0 100644
--- a/app/src/main/res/raw-ru/changelog_data.xml
+++ b/app/src/main/res/raw-ru/changelog_data.xml
@@ -1,5 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <releases>
+    <release version="0.4.4" date="05.02.2020">
+        <changes>
+            <change>Исправлена ошибка в диалоге выбора BIN-файла на Android 10.</change>
+        </changes>
+    </release>
     <release version="0.4.3" date="21.11.2019">
         <changes>
             <change>Исправлена обработка команды WAIT.</change>
diff --git a/app/src/main/res/raw/changelog_data.xml b/app/src/main/res/raw/changelog_data.xml
index 8df34ec..7c16efb 100644
--- a/app/src/main/res/raw/changelog_data.xml
+++ b/app/src/main/res/raw/changelog_data.xml
@@ -1,5 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <releases>
+    <release version="0.4.4" date="2020-02-05">
+        <changes>
+            <change>Fixed open BIN file dialog error on Android 10.</change>
+        </changes>
+    </release>
     <release version="0.4.3" date="2019-11-21">
         <changes>
             <change>Fixed WAIT opcode handling.</change>
diff --git a/build.gradle b/build.gradle
index 5880d16..ba8927f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
+        classpath 'com.android.tools.build:gradle:3.5.3'
     }
 }