Hello hello,
I've posted this before but I'll remind folks again.

If you see the UOA error after a patch, don't continue to log in.

Go to the UOAssist installation directory.
Find the directory called UOA-Settings
(In there you will see account | shard | character)
Simply "COPY" the character folder to the account folder.
Then all your settings are preserved. When you notice the error message has gone away, "MOVE" the folder back so that any changes you've made are saved.

Do not do this while in game.

The reason I mention not to continue to log in, is that if you do, UOA will make a new character folder for you under account. And you can become confused which folder is good and has present working macro's ect.

Now you will have to do this for every character you want to play, for every account, shard ect.

Heck in days long past, I even made a batch file to do the copy and moving for all my character.

This doesn't break anything, doesn't mess anything up, nor is it harmful. UOAssist is just confused due to the data stream, and reverts up one directory/folder for its settings. (think its an old setting/format style before OSI/EA put in data encryption)

Edit: This fix does not fix the data stream errors. It only transfers your macro's and UOAssist settings until UOAssist is fixed.

Good Luck,