You can save some tasks to a file from running or finished list. Recommended format is AbleGet file because it contains all options and informations about tasks. Default extension is agt and then you can load those tasks to the running list. Choose from the menu Running - Load file list... and open an AbleGet file.
A dialog is shown and you can see on the list available tasks. Uncheck items which you don't want to load and click OKbutton. ONLY checked tasks are loaded.