I was using seemusic normally, as I had been for the last two months, when I was playing with the tempo setting with midi. The moment I moved it, seemusic suddenly stopped responding. I restarted my PC, redownloaded the newest version, but each time, it still stops working at the start.
Version: 4.1.1, Windows 10
Thanks for sending the files. The issue was that the Tempo BPM had been set to 0. I've added a fix that prevents the Tempo from being set to 0.