DupeBlocker 2 retired August 1, 2017 and no longer functions.
DupeBlocker 2 has been retired. As of August 1, 2017 Validity does not support DupeBlocker versions below DupeBlocker 3, and DupeBlocker 2 does not operate. Only DupeBlocker 3 versions and above receive technical support and updates effective August 1, 2017.
DupeBlocker 3 was originally released in November 2013 and includes de-duplication across all objects (Opportunities & Custom Objects), a completely redesigned user interface and much more! Updates are included with your annual subscription, and there is no additional charge.
Please take a moment to install this latest version DupeBlocker from the AppExchange here. There is no need to uninstall the existing version of DupeBlocker. Detailed instructions regarding upgrading can be found here.