The software includes the Project Navigator, Synplify Pro for synthesis, and ModelSim Lattice Edition for simulation. The Shift to Paid Licenses
If you still require a license, here is the current landscape: ispLEVER Classic | FPGA Design Software isplever classic free license
Getting a free license for Lattice Semiconductor’s legacy software can be tricky, as the company shifted many of its "Classic" tools to a paid subscription model several years ago. However, for certain devices and legacy workflows, there are still ways to access the software or migrate to free modern alternatives. The software includes the Project Navigator, Synplify Pro