Yes. Check Toolbox works perfectly in Blender 4.X. Please ensure you're using the latest version (v1.4 or above). If you're on an older version (e.g. v1.3), download the latest file from your purchase platform and reinstall.
This usually happens due to:
add-on version incompatible with Blender (e.g. using v1.3 in Blender 4.0);
add-on files not fully replaced during installation, or cache conflicts.
Fix:
Fully delete the old add-on folder;
Install the latest version (v1.4);
Restart Blender and activate the add-on again.
Possible reasons:
Rendering settings in Blender 4.x may conflict on specific systems (e.g. macOS);
The “eye icon” is not enabled;
Auto-Refresh is off, or the display mode is incompatible.
We’re currently investigating compatibility issues on macOS. Please follow the add-on changelog for fix notifications.
Currently, the add-on does not show polygon or vertex counts in its panel.
You can use Blender’s built-in Statistics:
Open the Overlay panel;
Enable Statistics;
Check the object data in the top-left corner of the 3D View.
📷 How to enable Statistics – visual guide