I'm sorry but, I cannot replicate your problem, and nobody else has reported that error after the update.
Please create a log of the update process, this way:
- Go the the Addon Manager folder with the Window File Explorer
- Open a new command prompt there, by typing "CMD" and then Enter on the blank address bar on top of the explorer windows.
- Type the following:
Couatl_Updater2.exe /LOG=log.txt
The updater process will run normally, and will create a log.txt file in the Addon Manager folder. ZIP it and attach it to a post, so I can have a look at it.