The "Classic" version is restricted to older architectures that are not supported by the modern Lattice Diamond software. This includes: ispMACH 4000/Z/V/B/C legacy families. GAL (Generic Array Logic) ORCA FPGAs (older generations). Key Considerations OS Compatibility
The license file ( license.dat ) will be sent to your registered email. isplever classic free license
If you receive a “License Expired” error, change your system date to January 1, 2010, before launching, then change it back. The "Classic" version is restricted to older architectures