Max. Records Per Search
The maximum number of records that will be downloaded in one search. More records can be downloaded by clicking on Resume.

Max. Records Per Target
The number of records to download from each target. This value is also used when resuming a search and will download this many more records.

Max. Connections
The number of simultaneous connections. The faster and more reliable your internet connection the larger this value can be. If you get too many errors try setting this too a lower value.