Hi Lani,
BigOven has two locations to store recipes -- (a) online, on BigOven.com, and (b) recipe boxes. Recipe boxes are files that live on a local machine.
When you fetch a recipe from the online archive (by clicking "Import" on your BigOven web view window), it stores it on your local PC. In this case, your office PC. It does nothing to your home PC's copy of BigOven.
However, you can simply copy a recipe down from the archive in the same way on your home PC. We recommend you use your online "Try Soon" and "Favorites" list for this very purpose.