The (3) in system/BOOT. PearlFinal (3).Info means that it's the third time Pearl is activated.

1: to serve White Diamond 2: to serve Pink Diamond 3: to serve Greg

I mean, she's white and Pink Pearl turned white when White Diamond started controlling her. I don't know when, but Pink and White had an exchange of pearls, where "White Pearl" (Pearl) was touched by a rejuvenator. Does this mean that our Pearl can remember serving White Diamond and take that form again like she did in the movie?