Box Icons Scale: This value adjusts the size of the preview in the panel
Popup icons scale: This value adjusts the size of the preview in the popup search
Detail: For convenience, this option has been added, you can choose the resolution of the shadows, from the lowest to the best. It will have a fairly immediate impact on the shadows. This will only take effect using Eevee render, as Cycles don’t need this.
Popup Label: This if active, will show the name of the preview in the popup window
PDF Manual: Clicking this button will lead you to this manual
Check for update: Search automatically if there is a new version available. (It will not be installed automatically)