Iakov,We made a mistake in our set-up of Designer on the Adobe store and are fixing it.   The delay has to do with the time it takes to setup our internal systems to allow for the upgrade purchase.    You can download the trial version now at this link -- http://www.adobe.com/devnet/livecycle/?view=...

Designer ES2 is available as a paid-for upgrade ($29) to Acrobat 9 users.    It should be on the Adobe store shortly (it's not there yet, I checked).   We just release this week and it will take a little bit of time before it's posted.