Zardon on "[Plugin: Paid Memberships Pro] Paypal button opening up in new tab?"

Right now if I click on the paypal button on a membership level, the checkout page for paypal opens in the same tab so I get redirected away from my website. How can I edit the code so that a new tab will open up and a user can still see the website in its own tab and the checkout screen on another tab? I tried editing the paypal code on checkout.php but had no effect.

Here's what it looks like in the file:

<span id="pmpro_submit_span">
                              <form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_blank">
				<input type="hidden" name="confirm" value="1" />
				<input type="hidden" name="token" value="<?php echo esc_attr($pmpro_paypal_token)?>" />
				<input type="hidden" name="gateway" value="<?php echo esc_attr($gateway); ?>" />
				<input type="submit" class="pmpro_btn pmpro_btn-submit-checkout" value="<?php _e('Complete Payment', 'pmpro');?> &raquo;" /> </form>
			</span>

		<?php } else { ?>

			<?php
				$pmpro_checkout_default_submit_button = apply_filters('pmpro_checkout_default_submit_button', true);
				if($pmpro_checkout_default_submit_button)
				{
				?>
				<span id="pmpro_submit_span">
                                       <form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_blank">
					<input type="hidden" name="submit-checkout" value="1" />
					<input type="submit" class="pmpro_btn pmpro_btn-submit-checkout" value="<?php if($pmpro_requirebilling) { _e('Submit and Check Out', 'pmpro'); } else { _e('Submit and Confirm', 'pmpro');}?> &raquo;" />				</form>
				</span>

https://wordpress.org/plugins/paid-memberships-pro/