This is a big sore point with me. Lansweeper provides very little (well, none really) ability to update or enter data into the product other than directly through the UI. As mentioned, the only real option would be some sort of SQL update function, but that is not supported, and the results would not be sync'd to the Cloud (if you are cloud integrated). And on the Cloud side they have developed a pretty good API, but it is currently read-only. They say that is going to change real soon now. I'm hopeful, but certainly not holding my breath for a timeline.
So put in/vote up those feature requests! There are so many things I want to do with this product, but can't without this sort of functionality.