To open the file you might have to click on "Enable Editing" and "Enable Contents" to allow the program to run. In Japanese they're called "編集を有効にする(E)" and "コンテンツ有効化". (They're the yellow bars that pops up when you open the file for the first time).
After inserting the students' names into the list, the teacher should save the file, and then send the file to the students. (Please tell the students to click on "Enable Editing" and Enable Contents")
How to use it?
It’s pretty straight forward.
Just tell your students to interview their friends (using any topic or sentense structure that you would like your students to practice) and after asking and answering the questions, students click on their friends' names. The color will change from “Red”(I haven't talk to this person yet) to “Blue” (i've already talked to this person).
That's it.
I don't know if it's helpful, but feel free to use it.