How do I change roll timing in Simply Love?

I play on J6, and as far as I can tell, that doesn't make rolls any harder to maintain in the default SM5 theme. However, recently I downloaded Simply Love, and now it's practically impossible to keep rolls alive. Any time they appear, they destroy the flow of the chart entirely, and that sucks because tech charters just can't stop themselves from dumping these everywhere. How do I reset the rolls to their default timing without lowering the judgment difficulty?

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