I'm installing the software a second time and it won't accept the original KEY I obtained.
Each installation of the software creates a new Serial Number. The KEY used to activate the installation on the first computer will NOT work on the second computer. This is part of the copyright.
Use the new SN to get a KEY
here.
Be sure to activate the software using exactly the SAME NAME that was provided the first time it was registered. Serial Numbers and KEYS should always be input in ALL UPPER CASE.