page 42 in the manual. Took me all of 3 minutes to find it and I don't even own an SV2.
Factory restore of all settings
After making several changes, you might want to restore the original, factory status of the SV2 (including the favorite sounds and global settings):
1 Turn the instrument off.
2 Keep the FUNCTION button pressed.
3 Without releasing the FUNCTION button, turn the instrument on.
4 When its LED starts flashing, release the FUNCTION button.
5 Press the FUNCTION button again to confirm the restore operation.
6 At the end, all settings will be reset.