Hi there,
Yes, all of the defaults are filterable. For options in WPSP Pro, you can find the list in inc/defaults.php
For example, to change the social options:
add_filter( 'wpsp_defaults', function( $defaults ) {
$defaults['wpsp_twitter'] = false;
$defaults['wpsp_twitter_color'] = '#737373';
$defaults['wpsp_twitter_color_hover'] = '#0084b4';
$defaults['wpsp_facebook'] = false;
$defaults['wpsp_facebook_color'] = '#737373';
$defaults['wpsp_facebook_color_hover'] = '#2d4372';
$defaults['wpsp_pinterest'] = false;
$defaults['wpsp_pinterest_color'] = '#737373';
$defaults['wpsp_pinterest_color_hover'] = '#bd081c';
$defaults['wpsp_love'] = false;
$defaults['wpsp_love_color'] = '#737373';
$defaults['wpsp_love_color_hover'] = '#ff6863';
return $defaults;
}, 20 );