I believe MaF uses cheat engine to create their trainers and more recent releases of Factorio seem to be highly incompatible with cheat engines debugger, which is virtually essential to make a well working trainer.
Whether by accident or deliberate coding the CE debugger seems to fail badly at attaching to Factorio, especially since the 0.15 release.
In 0.14.XX the debugger itself would often fail to attach and simply not work but as of 0.15 trying to work with the debugger seems to entirely crash Factorio itself.
So unless some trainer experts find a way around this issue or find another method to create the trainers then I'm not sure we'll be seeing an updated Factorio trainer any time soon.