Predefined options for new tasks and some global parameters are set from main menu Tools - Options. All options with 
icon affects ONLY to new tasks. Tasks, that already are present (e.g. on the Running page), are not changed. To modify an existing task select it and click properties 
(Alt+Enter).
For detailed desriptions see:
General options
Downloads
Searching
MP3
Schedule
Internet
Connections
HTTP
FTP
Interface options
You can also schedule tasks and increase Internet speed.