Adding my thoughts to this thread that I just found while looking for something else. It is true that all versions of Secure Perfect went end of life and support probably 10 years ago by GE Security (long before the division was sold to Lenel) and the product did change to Facility Commander Wnx (as someone mentioned, not to be confused with Facility Commander Classic) with the release of version 7.0. Currently only FCWnx 7.6 and 7.7 (current version at Service Pack 4) are supported.
There is talk of a version 7.8 coming out early next year (2017), but that will primarily only add support for newer operating systems and version of SQL (currently only Windows 7 and Server/SQL 2008R2 are supported) and not much else (if anything). None of the software (even the supported versions) are available to download through proper channels, and must be obtained via a media kit. The database for FCWnx is still called Secure Perfect (they never changed those names) and can be easily converted from any earlier version from Secure Perfect 3 or above that uses the MSSQL database stucture (earliest version were a flat Access database and cannot be converted) as long as the database is not corrupted or has too many issues.
In addition to this, the PX and PXN controllers are also end of life and support as of December 2007, while the PXN+ will be supported until December 31, 2020 when FCWnx and Picture Perfect (along with all Casi-Rusco hardware) reach their end of life.
However, if you have the software (install media) you own the software and it is possible to get a new license key for it, contact your Authorized Lenel installer/reseller for details.
I hope this information helps.