This stand alone edition of Wrye Mash is based on the latest Yacoby's source. The "editing the file header" bug is fixed
and retains all the extra functionality like drag and drop which is missing from other versions.
It has mlox, TES3cmd and TES3lint support and many new features like:

A toolbar menu, 
mod order snapshots,
BSA Archives support,
extended UNICODE support,
Mod Enumeration,
Custom Commands,
Speed optimizations,
MWSE support,
and much more

Please visit Wrye Mash Polemos fork homepage in Nexus to download the binaries in the url below:
https://www.nexusmods.com/morrowind/mods/45439

Note: You will find a lot of "Polemos" inside the code. Those are most of my changes. 
Another thing also, I use an unorthodox python style, this is by choice (kinda OCD).