Normally, I would be happy to let this deprecated version of the addon just drift on in perpetuity, allowing anyone who is scared of the number 2 to avoid installing WeakAuras 2.
However, in light of the malicious custom scripts for WeakAuras that have been floating around the internet lately, it's safer for you, the end user, if we force you to update from version 1.x. Various changes to prevent people from importing nasty untrustworthy WeakAuras scripts, and to prevent custom scripts from doing nasty things in the first place, are being added to WeakAuras 2. That's why the latest update of WeakAuras 1.x simply disables the addon.
None of your data is deleted, and WeakAuras 2 has the same codebase and developers as the 1.x branch. Updating to version 2 is a completely painless process; just download it, put it in your Addons folder, and everything will work perfectly.
So please stop sending me hatemail PMs about how I deleted your saved displays or how I killed WeakAuras or whatever :(