General Description: I've recently obtained Foundation ISE 3.1i, or Foundation Classic 3.1i. Do I need a new license for FPGA Express?
解决方案
No, the same license file that enabled you to use FPGA Express 3.2 and 3.3 will enable you to use FPGA Express 3.4 which is packaged with 3.1i Foundation (ISE or Classic) software.