diff --git a/apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Files.android.kt b/apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Files.android.kt
index bfe961a512..2b601fea42 100644
--- a/apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Files.android.kt
+++ b/apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Files.android.kt
@@ -19,6 +19,8 @@ actual val wallpapersDir: File = File(filesDir.absolutePath + File.separator + "
 actual val coreTmpDir: File = File(filesDir.absolutePath + File.separator + "temp_files")
 actual val dbAbsolutePrefixPath: String = dataDir.absolutePath + File.separator + "files"
 actual val preferencesDir = File(dataDir.absolutePath + File.separator + "shared_prefs")
+actual val preferencesTmpDir = File(tmpDir, "settings_tmp")
+  .also { it.deleteRecursively() }
 
 actual val chatDatabaseFileName: String = "files_chat.db"
 actual val agentDatabaseFileName: String = "files_agent.db"
diff --git a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Files.kt b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Files.kt
index e9fc8c97f9..0a4f670fe0 100644
--- a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Files.kt
+++ b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Files.kt
@@ -3,7 +3,7 @@ package chat.simplex.common.platform
 import androidx.compose.runtime.Composable
 import chat.simplex.common.model.*
 import chat.simplex.common.ui.theme.*
-import chat.simplex.common.views.helpers.generalGetString
+import chat.simplex.common.views.helpers.*
 import chat.simplex.res.MR
 import com.charleskorn.kaml.*
 import kotlinx.serialization.encodeToString
@@ -11,6 +11,8 @@ import java.io.*
 import java.net.URI
 import java.net.URLDecoder
 import java.net.URLEncoder
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
 
 expect val dataDir: File
 expect val tmpDir: File
@@ -20,6 +22,7 @@ expect val wallpapersDir: File
 expect val coreTmpDir: File
 expect val dbAbsolutePrefixPath: String
 expect val preferencesDir: File
+expect val preferencesTmpDir: File
 
 expect val chatDatabaseFileName: String
 expect val agentDatabaseFileName: String
@@ -142,16 +145,23 @@ fun readThemeOverrides(): List<ThemeOverrides> {
   }
 }
 
+private const val lock = "themesWriter"
+
 fun writeThemeOverrides(overrides: List<ThemeOverrides>): Boolean =
-  try {
-    File(getPreferenceFilePath("themes.yaml")).outputStream().use {
-      val string = yaml.encodeToString(ThemesFile(themes = overrides))
-      it.bufferedWriter().use { it.write(string) }
+  synchronized(lock) {
+    try {
+      val themesFile = File(getPreferenceFilePath("themes.yaml"))
+      createTmpFileAndDelete(preferencesTmpDir) { tmpFile ->
+        val string = yaml.encodeToString(ThemesFile(themes = overrides))
+        tmpFile.bufferedWriter().use { it.write(string) }
+        themesFile.parentFile.mkdirs()
+        Files.move(tmpFile.toPath(), themesFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
+      }
+      true
+    } catch (e: Exception) {
+      Log.e(TAG, "Error writing themes file: ${e.stackTraceToString()}")
+      false
     }
-    true
-  } catch (e: Throwable) {
-    Log.e(TAG, "Error while writing themes file: ${e.stackTraceToString()}")
-    false
   }
 
 private fun fileReady(file: CIFile, filePath: String) =
diff --git a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Utils.kt b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Utils.kt
index f6aa8f732d..d5bbe4b352 100644
--- a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Utils.kt
+++ b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Utils.kt
@@ -318,6 +318,7 @@ fun removeWallpaperFile(fileName: String? = null) {
 
 fun <T> createTmpFileAndDelete(dir: File = tmpDir, onCreated: (File) -> T): T {
   val tmpFile = File(dir, UUID.randomUUID().toString())
+  tmpFile.parentFile.mkdirs()
   tmpFile.deleteOnExit()
   ChatModel.filesToDelete.add(tmpFile)
   try {
diff --git a/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Files.desktop.kt b/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Files.desktop.kt
index eeeb13e5cc..f7a87e3ced 100644
--- a/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Files.desktop.kt
+++ b/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Files.desktop.kt
@@ -17,6 +17,8 @@ actual val wallpapersDir: File = File(dataDir.absolutePath + File.separator + "s
 actual val coreTmpDir: File = File(dataDir.absolutePath + File.separator + "tmp")
 actual val dbAbsolutePrefixPath: String = dataDir.absolutePath + File.separator + "simplex_v1"
 actual val preferencesDir = File(desktopPlatform.configPath).also { it.parentFile.mkdirs() }
+actual val preferencesTmpDir = File(desktopPlatform.configPath, "tmp")
+  .also { it.deleteRecursively() }
 
 actual val chatDatabaseFileName: String = "simplex_v1_chat.db"
 actual val agentDatabaseFileName: String = "simplex_v1_agent.db"
diff --git a/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Resources.desktop.kt b/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Resources.desktop.kt
index 123e944b4e..4e7594f998 100644
--- a/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Resources.desktop.kt
+++ b/apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Resources.desktop.kt
@@ -36,18 +36,10 @@ catch (e: Exception) {
   false
 }
 
-private val settingsTmpDir = File(desktopPlatform.configPath, "tmp")
-  .also {
-    it.deleteRecursively()
-    it.mkdirs()
-  }
-
 private val settingsFile =
   File(desktopPlatform.configPath + File.separator + "settings.properties")
-    .also { it.parentFile.mkdirs() }
 private val settingsThemesFile =
   File(desktopPlatform.configPath + File.separator + "themes.properties")
-    .also { it.parentFile.mkdirs() }
 
 private val settingsProps =
   Properties()
@@ -68,12 +60,13 @@ private val settingsThemesProps =
   Properties()
     .also { props -> try { settingsThemesFile.reader().use { props.load(it) } } catch (e: Exception) { /**/ } }
 
-private val lock = "settingsSaver"
+private const val lock = "settingsSaver"
 actual val settings: Settings = PropertiesSettings(settingsProps) {
   synchronized(lock) {
     try {
-      createTmpFileAndDelete(settingsTmpDir) { tmpFile ->
+      createTmpFileAndDelete(preferencesTmpDir) { tmpFile ->
         tmpFile.writer().use { settingsProps.store(it, "") }
+        settingsFile.parentFile.mkdirs()
         Files.move(tmpFile.toPath(), settingsFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
       }
     } catch (e: Exception) {
@@ -85,8 +78,9 @@ actual val settings: Settings = PropertiesSettings(settingsProps) {
 actual val settingsThemes: Settings = PropertiesSettings(settingsThemesProps) {
   synchronized(lock) {
     try {
-      createTmpFileAndDelete(settingsTmpDir) { tmpFile ->
+      createTmpFileAndDelete(preferencesTmpDir) { tmpFile ->
         tmpFile.writer().use { settingsThemesProps.store(it, "") }
+        settingsThemesFile.parentFile.mkdirs()
         Files.move(tmpFile.toPath(), settingsThemesFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
       }
     } catch (e: Exception) {