-replace pages/submit.php
-replace pages/server_edit.php

-replace core/init.php
-replace core/classes/IpnListener.php

-replace languages/english.php


Run these queries one by one with your database manager ( ex: phpmyadmin )
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ALTER TABLE `servers` CHANGE `name` `name` VARCHAR(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL;

ALTER TABLE `servers` CHANGE `website` `website` VARCHAR(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL;