Is a restart needed to see the whole content? Last time I played it was version 1.3.0Extended, but the changelog mention the rework of some scenes.
Some earlier scenes were reworked and expanded (one that gets mentioned most is the spin-the-bottle game in the dorm with Carol, Yuki, and Ashley). It may not force you to restart, but in order to catch those changes, you will need to play from the beginning (the actual beginning, before getting on the bus, is another scene that was expanded a fair bit).
If you previously used the SanchoMod, you'll need to keep using his save-fixer with each new update, so that's another one where it might be better to restart.