Hi there ...
The ITX plugin for ACE Toolkit is separately developed to the ACE core product and, as noted, the ITX plugin which is generally available does not yet support ACEv13... but the engineering teams are in contact discussing this topic. You can reach out directly to the Product Manager responsible for the ITX plugin to get the latest status on plans and timing: Rhythm Gupta (Rhythm.Gupta@ibm.com)
Hope this helps! Cheers, Ben
------------------------------
Ben Thompson
IBM UK
------------------------------