henkaku.suprx is henkaku settings in the tai config.txt. if it's missing, henkaku settings will be missing too. it sounds like it didn't like the way your config.txt was configured or a plugin entry was screwing something up.
I'll try remember this for next time, but hopefully there won't be a next time! I've got all the plugins I need now anyway so hopefully I won't run into these problems again.
Thanks so much once again!