Relating to [url]Calculate Folder Sizes Automatically] I wonder if it's possible to show sizes in "folder size" column in apt unit, ie. MB or GB if necessary. Currently it shows all sizes in KB which is unconvenient when exploring large directories.
You would really need to ask this of the Folder Size developers; it doesn't have anything to do with Opus.
Ok, I found some options in Control Panel.
Is it possible to use Folder Size information in calculating relative sizes on disk in Opus?
No, Opus doesn't know what that column means. It's just a piece of data which a shell extension provides for display.
To see a relative-size graph for a folder in Opus you need to make Opus calculate the folder size itself rather than (or as well as) using the shell extension's column.