Update: The issue has been resolved in SSIS+ 1.4 SR-3.
CozyRoc has just learned there is backward compatibility issue under the 64bit Windows Server 2008 R2 edition (Thank you, Natali). The issue is the same like the one reported a couple of weeks ago in Windows 7. After installing CozyRoc SSIS+ the opening of SSIS packages is no longer possible. We are trying to resolve the issue with the Windows team. In the meantime you can use the manual fix we have published in the FAQ.