Yes - Setup > PAR2, enable PAR2 Checking, then PAR2 repairing. With these options active, Altbinz will automatically download the required number of PAR2 repair files to fix missing or incomplete downloads (but only if these are paused in the download queue first.
Edit: Sorry, just read the title again, I may have misunderstood you. Could you rephrase the question, as it's a bit unclear what you mean?
-Hecks