I was about to try and install the desktop application on my Linux system.
I followed the instructions to first install Java (which I already had) and Adobe AIR (which I did not).
However, on going to the Adobe page I discovered that AIR support for Linux has been discontinued for some time -- 2.6.0 was the last release.
I'm reluctant to install this, because
(a) it's no longer supported, hence I cannot expect it to receive patches for
any security vulnerabilities, or to keep working with newer versions of
(b) as far as I can tell, there is no way to install it as a normal user,
without giving it root access.
Are there any plans to support Linux without requiring obsolete versions of AIR?