In Plesk Onyx 17.8, there is the new interface in the WordPress Toolkit (in version 3.0.0 or higher).
In this new interface, it is not convenient to perform some operations with multiple WordPress instances, for example, updating or checking the security.
Is it possible to switch WordPress Toolkit to the old interface?
Install the extension Panel.ini Editor.
Go to Extensions > My Extensions > Panel.ini Editor > Open > Editor.
Add the following text to the end of the file:
useUiLibrary = 0
Click Save to apply changes.
Additionally, if a dedicated button for switching to the old interface of the WordPress Toolkit should be added to Plesk, please take part in our product improvement by referring to the following link: https://plesk.uservoice.com/forums/184549-feature-suggestions
The top-ranked suggestions are likely to be included in the next versions of Plesk.