So I tried to update to v426b on Mac, but Adobe Air says it can't download the app and I should notify the developers.

You must re-download the program from the download page. Once you download the installer, Adobe Air will ask if you'd like to replace v426 with v426b. Click yes and the new update should install.

If you have any further questions, I'd be glad to answer them!

Successful!

Glad it worked!

Doesn't work for Linux. Get a message that says that the installer was misconfigured.