Yes. If you have a WordPress Multisite install (and you’ll know if you do – it’s fiddly to set up), then you need WP-Optimize Premium. If an optimization plugin has not been particularly written for WordPress Network usage, then it will be insecure – it will allow every blog admin on the network to do operations on the entire network. With our WP-Optimize Premium, only “super admin” will have access to optimization operations.
WP-Optimize is always undergoing improvements and developments and is therefore always considered ongoing work; it is impossible to rule out unforeseen situations and bugs. So we would recommend you to test WP-Optimize out on your local system and always make a backup of your database
The base WP-Optimize plugin is free, and fully functional (it is not “crippleware” that hamstrings you unless you pay). If you want extra features, then you can buy WP-Optimize Premium, which includes all additional functionalities, plus upgrades and support for one year. If you choose Premium, you can get it conveniently and easily in our shop.
For one year after purchase. After that, your subscription will be renewed automatically.
A one-year policy is standard in the WordPress plugins market, and allows us to have a sustainable business so that you can rely on WP-Optimize for years to come.
I’m afraid that this is not possible. Please ensure that you make a backup of your entire database before using WP-Optimize for the first time, and when you upgrade to a major new version of it. We recommend UpdraftPlus.