I see that your file has a "*" in the empty rows. This was how some earlier versions stored unused rows. They should be totally blank. Starting from scratch may clear up the problem. I may need to look into that again. You may see "Not Yet Implemented", then 3-way if you scroll past 3-way. This is because when you select the others (such as 2.5 way, etc.), it pops up the message, then resets the selection to the last good selection (3-way if you had scrolled).
If that doesn't clear it up, download the v1.105 file again, uninstall the old and reinstall the latest. You may be one of the few with a bug accidentally introduced that is cleared. A few downloads occurred before I found the problem, but that problem hung the program, not the same symptoms, just be sure you have the latest in any case. I'd also suggest starting from scratch, start the program, load the six files and select 3-way after that. It's possible something got into the saved session file.
Send my your files, all six, in a zip if you continue to have problems. Include the problem session file. I'll see if I can replicate the problem. So far I've had no other reports of problems.