Import Multiple Categories

Thank you for your great LDD Directory plugin.
I purchased the importing add-on but facing one problem now – it allows to import only one category per entry when I need multiple.

I have all categories separated by comas in one column like this for example:

Alternative Energy, Architecture, Building Contractor, Building Systems

Is it possible to import multiple categories? Any other way I can do it in bulk?

Any help would be greatly appreciated!

Kind Regards,