File Converter not working

[RvP21]

Hello everyone,

At the moment i'm trying to make a map. In this map i was planning on using multiple skins on the same model-in this case an ogre model. On the Hive, i found a tutorial with links to the required tools to do it.
(How To Make One Model Use Many Skins | HIVE (hiveworkshop.com))

I've followed the tutorial step by step and it worked fine up till step 4. While trying to convert a changed .mdl file back into a .mdx file, i got some kind of error. I've added a picture of it at this post.
Does someone know what the problem is and how it can be solved?

 

[BogdanW3]

The tool in the screenshot is ancient and likely wouldn't work on any windows newer than XP; use Retera's model studio or possibly War3ModelEditor to convert to and from mdx instead.

 

[RvP21]

The tool in the screenshot is ancient and likely wouldn't work on any windows newer than XP; use Retera's model studio or possibly War3ModelEditor to convert to and from mdx instead.

Thanks for the advice! I will take a look at it.