There are a lot of free and NON-adware P2P programs… are you sure you want to keep this particular one? :
For the Standard Shield provider (on-access scanning):
Left click the ‘a’ blue icon, click on the provider icon at left and then Customize.
Go to Advanced tab and click on Add button…
For the other providers (on-demmand scanning):
Right click the ‘a’ blue icon, click Program Settings.
Go to Exclusions tab and click on Add button…
You can use wildcards like * and ?.
But be carefull, you should ‘exclude’ that many files that let your system in danger, specially when related to P2P programs… 