Korg was at least quick to respond. They said the problem is known and they’re working on it.
Here are the links to the previous version, which works better for me:
MAC
https://storage.korg.com/korgms/korg_collection/mac/TRITON_1_4_1.dmg
PC
https://storage.korg.com/korgms/korg_collection/mac/TRITON_1_4_1.zip