How you switch to the old version I forgot

Following.

01. when you're reading a chapter there's a icon on the top right corner with 03 lines, click on it.
02. when you click on it, a drop down menu appears and it gives you a list of options, click "old version"
there you go! happy reading and have a lovely day/night! ヾ(❀╹◡╹)ﾉ~