Hey go4goal, you can either use the internal editor of UltraStar or the YASS editor to edit the txt file. The internal editor can be accessed by hitting "E" in the song selection and YASS can be found here: https://yass-along.com/
I’m sorry, my txt-file isn’t very good. I created it with the UltraStar creator, but I haven"t found out yet how to adjust the notes and lengths. So it’s basicly just the words with the right timing. I’ll be more than happy to improve the file once I find out how ^^