Latest version is: 0.5e

Download Mentat for Windows (full) [~12Mb]

Download Mentat for Windows (checkbook only) [~12Mb]

Download Mentat sources [~800Kb]

Get releases from a SourceForge downloads page.

Windows users: get mentat-installer-(version).exe and run it. The installer includes Qt 4.8 libraries, thus big size.If you are building with encryption, you have to install vcredist_x86 from Microsoft.
Linux users: grab the latest tarball and follow developers instructions