Let me try...
If you edit the Encounter Data on a route with a script, the game will stop working.
To prevent this, you must delete the script(s? Anon, clarify this, please), and place random text, like say, "dfdsfasdfasdfnsdnjknsdfa" and save. PPRE won't save the random text, so the old scripts will stay. It looks like nothing has changed, but doing this will prevent your game from freezing every time.
Anything I got wrong?
Mouse, we might be dealing with someone who isn't a native speaker, so we have to be simple and not use idioms to let them understand.