If I use a New XYZ file to Import into OSD for the same Area. Will it charge me again when I want to Export or do the Analysis?
Yes, it will because it is a NEW osd file. The fact that you have paid for a design is only stored in the other osd file. However, if you make an honest mistake we are happy to re-credit you. Just email us at firstname.lastname@example.org with the details.