Better way of setting it maybe?

AndroidCompat/Config/src/main/java/xyz/nulldev/ts/config/ConfigManager.kt

@@ -11,7 +11,6 @@ import com.typesafe.config.Config
 import com.typesafe.config.ConfigFactory
 import com.typesafe.config.ConfigRenderOptions
 import mu.KotlinLogging
-import net.harawata.appdirs.AppDirsFactory
 import java.io.File
 
 /**
@@ -47,7 +46,7 @@ open class ConfigManager {
 
         //Load user config
         val userConfig =
-            File(System.getProperty("ir.armor.tachidesk.rootDir"), "server.conf").let {
+            File(tachideskRootDir(), "server.conf").let {
                 ConfigFactory.parseFile(it)
             }
 

AndroidCompat/Config/src/main/java/xyz/nulldev/ts/config/RootDir.kt

@@ -0,0 +1,17 @@
+package xyz.nulldev.ts.config
+
+import net.harawata.appdirs.AppDirsFactory
+
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+fun tachideskRootDir(): String {
+    return System.getProperty(
+            "ir.armor.tachidesk.rootDir",
+            AppDirsFactory.getInstance().getUserDataDir("Tachidesk", null, null)
+    )
+}