On Mac Version 12.5.1 (was happening before Monterey upgrade as well), I want to choose a filename to render to, but I've been trying various settings so the filenames are similar. The freezing happens most when I select an existing file and try to rename it. It highlights the selected filename and appears to give focus to the file textbox for editing and then freezes so I can't modify the filename. I have to Force Quit SeeMusic every time in order to try again. It sometimes works after several restarts, but it shouldn't do it at all. I can work around it by typing out the filename each time, although I think it has frozen on some occasions even when I do that.
I am trying to render in ProRes if that matters for this bug.