Here is an online ITM editor guys.
You can upload your ITM file , edit it and download it back.
a3tools.pcriot.com
After you upload the file it will take some time to download the javascript library and build the window & grids. Hopefully, js library will be cached and next time you use it will be much faster.
If there items/weapons missing from the list then give me an updated list and I will update mine.
Enjoy






