I have just bought the Superior Drummer 3 (crossgrade from EZ Drummer 2) and installed it with the Product Manager. and so far so good. I have tried to install my two EZX’s pack (MetalMachine & Metal!) with no results. Even if I download the files and install it with the product manager it shows “the installation is not complete. See the installation info tab”. What have I missed? Is the EZX even compatible with Superior Drummer 3?