Gravity Forms Image Choices

hi, if i installed and active 1.3.70 version i get a php error:
“Parse error: syntax error, unexpected ‘public’ (T_PUBLIC) in /…/public_html/wp-content/plugins/gf-image-choices/class-gf-image-choices.php on line 2624”. The 2624 row is this:
“public function license_validation( $field, $field_setting ) {…}” so this php error is due to licence issue?

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