[Eru]

I enabled it by just editing the UO.cfg file to turn it on. BUT, you'll also need to set the log path. Also, do it in the file for your character, not the on in the UO folder. Here's a sample of mine:

C:\Ultima Online\Desktop\account\Imagine Nation\character
JournalSaveFile=C:\Users\user\Documents\INLog.log
SaveJournal=on