In the next big update (18.104.22.168), Tree of Savior will no longer be supported. Only a couple of people still actively use Hook64 for Tree of Savior and I've already dropped new feature support in a previous version.
Sorry for any inconvenience if you still use Hook64 for Tree of Savior.
This update should come out by October 2019. I'll post more information a few weeks before I release it.