diff --git a/docs/configDirFormat.md b/docs/configDirFormat.md
index b9ade8b..ccdb432 100644
--- a/docs/configDirFormat.md
+++ b/docs/configDirFormat.md
@@ -11,7 +11,7 @@ Top-level folders are `presets`. It's like template when you create new project
 Next, `type` should be selected. It's main template files. Default is `root`. It's for root project. There is
 idea that in some cases variations of main template files will be needed (with the same extensions).
 
-Files with extension `.jar` is considered binary files, and they will be copied without variables substitution.
+Files with extensions `.jar` and `.bat` are considered binary files, and they will be copied without variables substitution.
 All other files are considered template files and variable substitution will be done.
 
 ## Extension
@@ -25,7 +25,7 @@ Case is ignored, it will be uppercase as variable. Values of variable is content
 
 Please, note that `project` extension name is reserved for data from `kbre.yaml` file.
 
-Files with extension `.jar` is considered binary files, and they will be copied without variables substitution.
+Files with extensions `.jar` and `.bat` are considered binary files, and they will be copied without variables substitution.
 All other files are considered template files and variable substitution will be done.
 
 ## Variable
diff --git a/src/nativeMain/kotlin/name/stepin/action/update/Extension.kt b/src/nativeMain/kotlin/name/stepin/action/update/Extension.kt
index 679b2ad..3be2b75 100644
--- a/src/nativeMain/kotlin/name/stepin/action/update/Extension.kt
+++ b/src/nativeMain/kotlin/name/stepin/action/update/Extension.kt
@@ -14,7 +14,6 @@ data class Extension(
         private val reservedFiles =
             setOf(
                 "gradle/libs.versions.toml",
-                "vars",
             )
 
         fun loadExtension(
@@ -25,13 +24,17 @@ data class Extension(
             val path = extensionsPath / name
             val extra =
                 listRecursively(path)
-                    .filterKeys { !reservedFiles.contains(it.relativeFilename) }
+                    .filterKeys {
+                        !reservedFiles.contains(it.relativeFilename) && !it.relativeFilename.startsWith("vars/")
+                    }
                     .entries.associate { it.key to it.value }
 
             val newExtra =
                 if (new) {
                     listRecursively(extensionsPath / "$name-new")
-                        .filterKeys { !reservedFiles.contains(it.relativeFilename) }
+                        .filterKeys {
+                            !reservedFiles.contains(it.relativeFilename) && !it.relativeFilename.startsWith("vars/")
+                        }
                         .entries.associate { it.key to it.value }
                 } else {
                     emptyMap()
@@ -40,18 +43,28 @@ data class Extension(
             val libs = loadIfExists(path / "gradle/libs.versions.toml")
             val libsMap = if (libs.isNullOrEmpty()) emptyMap() else mapOf("LIBS" to libs)
 
-            val vars = listRecursively(extensionsPath / "vars")
-                .entries.mapNotNull {
-                    val filename = it.key.relativeFilename
+            val vars =
+                listRecursively(path / "vars")
+                    .entries.mapNotNull {
+                        val filename = it.key.relativeFilename
 
-                    val content = loadIfExists(path / filename)
-                        ?: return@mapNotNull null
+                        val content =
+                            loadIfExists(path / "vars" / filename)
+                                ?: return@mapNotNull null
 
-                    val varName = filename.substringBeforeLast(".").uppercase()
+                        val varName = filename.substringBeforeLast(".").uppercase()
 
-                    varName to content
-                }
-                .toMap()
+                        varName to content
+                    }
+                    .fold(mutableMapOf<String, String>()) { map, (k, v) ->
+                        map[k] =
+                            if (map.containsKey(k)) {
+                                map[k] + "\n" + v
+                            } else {
+                                v
+                            }
+                        map
+                    }
 
             return Extension(
                 name = name,
diff --git a/src/nativeMain/kotlin/name/stepin/action/update/FilesGenerator.kt b/src/nativeMain/kotlin/name/stepin/action/update/FilesGenerator.kt
index 1a19f4b..8877d4c 100644
--- a/src/nativeMain/kotlin/name/stepin/action/update/FilesGenerator.kt
+++ b/src/nativeMain/kotlin/name/stepin/action/update/FilesGenerator.kt
@@ -18,7 +18,7 @@ data class FilesGenerator(
     val variables: Map<String, String>,
 ) {
     companion object {
-        private val varRegEx = Regex("%[a-zA-Z0-9\\-_]*%")
+        private val varRegEx = Regex("%[A-Z0-9_]+%")
 
         fun substituteVariables(
             template: String,
@@ -32,7 +32,7 @@ data class FilesGenerator(
             }
 
             // replace undefined variables
-            content.replace(varRegEx, "")
+            content = content.replace(varRegEx, "")
 
             return content
         }
diff --git a/src/nativeMain/kotlin/name/stepin/action/update/UpdateAction.kt b/src/nativeMain/kotlin/name/stepin/action/update/UpdateAction.kt
index 3df056b..ca9840a 100644
--- a/src/nativeMain/kotlin/name/stepin/action/update/UpdateAction.kt
+++ b/src/nativeMain/kotlin/name/stepin/action/update/UpdateAction.kt
@@ -81,9 +81,20 @@ class UpdateAction {
         extensions: List<Extension>,
         variables: Map<String, String>,
     ): Map<String, String> {
-        return extensions.flatMap { it.variables.entries }.associate {
-            it.key to substituteVariables(it.value, variables)
-        }
+        return extensions.map { it.variables }
+            .fold(mutableMapOf()) { map, varsMap ->
+                varsMap.forEach {
+                    val k = it.key
+                    val v = substituteVariables(it.value, variables)
+                    map[k] =
+                        if (map.containsKey(k)) {
+                            map[k] + "\n" + v
+                        } else {
+                            v
+                        }
+                }
+                map
+            }
     }
 
     private fun prepareVariables(configuration: UpdateConfiguration): Map<String, String> {
@@ -128,7 +139,8 @@ class UpdateAction {
 
     private fun isBinary(): (Map.Entry<WriteTarget, Any>) -> Boolean =
         {
-            it.key.relativeFilename.endsWith(".jar")
+            it.key.relativeFilename.endsWith(".jar") ||
+                it.key.relativeFilename.endsWith(".bat")
         }
 
     private fun prepareLibsVersionsTemplate(
diff --git a/src/nativeMain/kotlin/name/stepin/utils/MapUtils.kt b/src/nativeMain/kotlin/name/stepin/utils/MapUtils.kt
index 3c1acc8..f890ea8 100644
--- a/src/nativeMain/kotlin/name/stepin/utils/MapUtils.kt
+++ b/src/nativeMain/kotlin/name/stepin/utils/MapUtils.kt
@@ -1,7 +1,6 @@
 package name.stepin.utils
 
 object MapUtils {
-
     fun Map<String, String>.uppercaseKeys(): Map<String, String> {
         return entries.associate { (key, value) -> key.uppercase() to value }
     }