To resume a piece of unfinished research, click Contacts from the left hand menu.
Click on the name of the contact in the Contacts panel, any research done on the client will then show in the Activities panel:
Marks incomplete research.
Marks completed research (see related article on how to view a completed report).
Right click on an incomplete piece of research you wish to resume, a menu will appear:
Select Resume. This will then load up the incomplete research ready for you to finish.