Spring Tool Suite的Checkstyle插件已安装，但我无法访问它

I have recently installed Spring Tools Suite 3.6.3 and then installed the "Checkstyle" plugin via Help -> Eclipse Marketplace. "Checkstyle" plugin version was 6.2.0. However, although the installation was successful I cannot configure the Check configuration because I simply cannot acces the Windows -> Preferences - > Checkstyle option in STS as if the plugin was not installed. Please help. Thank you.I have recently installed Spring Tools Suite 3.