Versions 2/3 do the same basic thing as V1, V4 however is the one that fully deletes the logs, at least it does on PC I am assuming there is a version 4 on other versions. I would recommend using that ASAP. Also do you know about the software versions in the software menu? Are you sure that is read...

Just bought this other day for my nexus 7, have been playing the PC version since its release years ago,and loved the idea playing this on the go So i started out doing training then going onto missions, went and bought log deleter v2, v3 then took another mission, but when i tried to delete the Log...