window 10 phpstudy cannot start zend optimizer after changing to 5.2.17, and the extension function does not display these important extensions.

The online teaching said that changing to 5.2.17 will have zend optimizer, which is not useful to me at all It's useless, not to mention that I originally wanted to use version 5.2. I deleted and installed it many times. After trying several versions, I couldn't start it. However, there is a zend optimizer directory in the php extension directory. What's the reason? , teachers, can you save me?