The Order_TempDocumentBrowseFolder property sets the default folder location when uploading documents on the Documents tab for temp orders. Then, when Upload is selected for a document, the file location entered in this property is opened by default.
Config Option > User > User_UserSetting
Valid folder location.
Where the setting is reflected...
Order section's Documents tab when uploading documents, and on the Order section's Candidate tab when adding a document.