At this time there is no "Default" option to import your D-Tools Catalog into Cloud. However, users can utilized the CSV Import feature to manually import their products into the application and bring over majority of the associated product data from SI.
Please visit the following article for a list of available fields which can be mapped between the two different applications: D-Tools Cloud Fields available for import
Please visit the following article for detailed documentation regarding Exporting Products from D-Tools SI: Exporting D-Tools SI Products
Last but not least, we are working to provide a default migration path for our current D-Tools SI customers down the road.