ECU is not locked, simply make a copy with a ProTune 2015 MTW to reinstall it in another MTW.
Myself I installed a copy of my ecu 2013 MTW for another MTW2013, its box ecu bought nine from Malvern was empty, I copy and paste with ProTune 3.3.
It only takes one owner of MTV with automatic fan makes a copy of the ECU with ProTune if he is able and send mail, the file is about 90 KB.