The 2.0.0 stable release is finally here! Version 2.0 has finally reached the level of quality where I feel it is ready to replace version 1.0.6 as the official stable release.
Version 2.0 is unfortunately incompatible with 1.x versions. For this reason, version 1.0.6 is still available on the download page as a ZIP package (Windows) that does not require installation, so that it can be used in parallel with the new version.
The public server will be switched over to version 2.0 later today. Privately run 1.x servers will of course continue to function, and the public listing server will continue to accept announcements from the old version.
Compatibility notice: If you get an error saying "this is not a drawpile server" when you connect to a server, that means you're running version 1.0.6 and the server requires 2.0. If you try to connect to a 1.0 server with the 2.0 client, the client will just sit there until the connection times out. (It's waiting for a message in the new format that will not arrive.)
When upgrading from 1.0.6, I recommend first uninstalling the previous version to make sure no old libraries are left over. The Windows version now comes in 64 and 32 bit varieties. If the 64 bit version does not work for you, try the 32 bit one.
So, what's new in version 2.0? Read on to find out. (TL;DR at the end.)