F7 works fine for me (TCC 34.00.19). Which version are you running, and how are you running it — in a console window, in a Take Command tab, in a Windows terminal tab?
A lot of times, a 'crash' in a TCC popup window is caused by the window popping up unseen: underneath the Take Command window, or offscreen. TCC is still running; it's just waiting for you to close the popup window... which you can't do, because you can't see it. You might try minimizing the Take Command window (or Windows Terminal) window and see whether your missing popup is hiding underneath.