This is the 2016.06.425 version (june, 2016). :
All new version are 64 bits. We no long provide 32 bits versions. You can, however, compile your 32 bits version by source code by svn.
Ubuntu 16.04 and more recent, 2016.06.425ubuntu16.04+ version debian package Linux 64 bits
Ubuntu 15.10 and older: 2016.06.425 version debian package Linux 64 bits