Remember that 4.2.0 works only with IDA 6.8, if you have an older IDA license, there goes the link to the 4.1.0 that is compatible with IDA 6.5+: https://dl.google.com/dl/zynamics/bindiff410-win-x86.msi

UPDATE:

Linux is here: https://dl.google.com/dl/zynamics/bindiff410-debian7-amd64.d...