Further perusing that same forum I found this 'gem' -

The best solution is to uninstall the client, and download the most current version. The current client was updated 6/21 and has this fix, as well as others.

There is no known problem with the workaround fix available for download. People suggesting otherwise are just making up horror stories to scare others.
Ok, so now you know the fix - after doing this appeal your case to the game admins as politely and coherently as possible, and show them where you've spent rl cash buying things from them. Since so many were banned and Aeria's numbers suck anyway, and money talks, they'll most likely reinstate you.