I just installed the plugin.
Saved Caching On (Recommended)
Wend to Advanced Tab
Did recommended settings
Clicked update status
Then it says : Rewrite rules must be updated
The rewrite rules required by this plugin have changed or are missing. Scroll down the Advanced Settings page and click the Update Mod_Rewrite Rules button.
But I have no Update Mod_Rewrite Rules button
I did see some youtube videos where people have this button. But I do not have it.