diff --git a/src/FileUpdater.php b/src/FileUpdater.php
index caef795..04435a4 100644
--- a/src/FileUpdater.php
+++ b/src/FileUpdater.php
@@ -181,7 +181,7 @@ public static function upgradePhpFiles(): void
                 strpos($fileStr, 'FacturaScripts\Core\Model\Base') === false &&
                 strpos($fileStr, 'function clear()') === false &&
                 strpos($fileStr, 'DataBaseWhere') === false &&
-                strpos($fileStr, '$this->addButton(') === false &&
+                strpos($fileStr, '->addButton(') === false &&
                 strpos($fileStr, 'Core\Model\Base\JoinModel') === false
             ) {
                 continue;
@@ -442,6 +442,13 @@ public static function upgradePhpFiles(): void
             // reemplazamos protected function onChange($field) por protected function onChange(string $field): bool
             $fileStr = str_replace('protected function onChange($field)', 'protected function onChange(string $field): bool', $fileStr);
 
+            // migramos addButton($viewName, [...]) a tab($viewName)->addButton([...])
+            $fileStr = preg_replace(
+                '/\$this->addButton\(\s*([^,]+)\s*,\s*(\[[\s\S]*?\])\s*\);/m',
+                '$this->tab($1)->addButton($2);',
+                $fileStr
+            );
+
             // manejamos el archivo Init.php específicamente
             if (basename($pathFile) === 'Init.php') {
                 // añadimos tipo de retorno void a init() y update() si no existe