There is an update release, but its not quite right to tell "Logistic Pipes is updated". The official release of Logistic Pipes is from Krapht. It was his idea and his code, everything whats not from Krapht is an unofficial update.
Krapht released LP under the MMPL. That license explicitly grants permissions for people to decompile and modify the code (section 4), create derivative works (section 5), and distribute those works (section 6) provided they also license that work under the MMPL and provide access to the source code. It is essentially a stripped down, quasi-GPL tailored to not infect Mojang's codebase.
That means people can say that Krapht hasn't updated his version of Logistics Pipes, but not that Logistics Pipes itself has not been updated. What the people who are working on the RS485 version have done is a legitimate, explicitly allowed, fork of the project. Absent any update to the code base by Krapht, what is "official" is what is actively developed, relatively updated, and works in the current environment. That describes the RS485 code base. It is as legitimate as Krapht's version and to refuse it, nor to point other people to it, in spite of the license explicitly allowing for just this use, is counter productive.