Need help on conversion of supply voltage of butterfly

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Hi dude,
For 5V system application, I've to convert supply voltage of butterfly from 3V to 5V. I study the schematic of it, I've found the component which is limited to 3V is "Dataflash (AT45DB041B-SC-2.5)" only.

1) Does anyone know how to convert? what to do with dataflash?
2) Are there any other components which are sensitive to 5V?
3) Can I use Jtagice MKII after converted to 5V?

Thank in adv,