After programming the ***_time_limited.sof file from the Quartus II programmer to the FPGA, a window called “OpenCore Plus Status” will appear.
There is a message ``Click Cancel to stop using OpenCore Plus IP.'' and a Cancel button in the window, and if you press the Cancel button, the operation of the FPGA will stop.
Please verify the operation without pressing the Cancel button.
 
When the download cable is removed from the board after programming, the operation will end after about an hour.
If the PC and board are connected with a cable, it will work continuously without ending.
 
Please note that the ***_time_limited.sof file is generated for free evaluation purposes before acquiring a formal license, so you cannot generate a POF file from this state.