Due to an influx of spam, we have had to approve account registrations. Please write an email to support@manjaro.org, with your username, if you want to get access faster. Sorry for the inconvenience.
Currently if you disable AUR in settings it turns of the search but don't hide it. Therefor it is possible to re-enable it (and it works) but settings shows still disabled AUR support.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information