It is strange that you do not see the option, if you could share your save file we could investigate further, at this link https://www.dropbox.com/request/iAEFvUrZelO5bsfafcoY
The save file is stored here:
-Win: C:\Users\{user_name}\AppData\Roaming\RenPy\Heroes University H 0.2.7\
-Win: {Game_Folder}/saves/
-Android: /storage/emulated/0/Android/data/com.huh/files/saves/
-Android: /storage/Android/data/com.huh/files/saves/
Mac: $HOME/Library/RenPy/Heroes University H 0.2.7