I am pretty sure the original files are XL3 format which were converted from Vixen files. That was probably done around november of last year, perhaps october. I can't remember for sure. Not sure I can find out since I think I deleted the old software when I moved computers. It is possible those are XL4 files but I didn't think I tried that on the old computer, so pretty sure they are XL3.
I took those XML files to make the XL4 files. I just did that tonight using version 4.2.19.