I also seem to be having the same problem, regardless of where I run the program from. I'm on Windows 10. I get the same error when I try to create a new sequence. The name "Test" here stays on the opening sequence menu after I try to make it, but I cannot edit any of the info for it. Further, if I try to duplicate any of the existing sequences, it allows me to rename the copied sequence, but the copy doesn't show up on the Title Sequence dropdown menu. Hope I'm not necro-ing a dead thread here, but it looks like there was no solution yet.