Which file needs to be edited to change a hero’s specialization?

You should contact the Wog forums, ...

Regarding the templates, it's possible that you are not packing the rmg.txt file back correctly...

Thank you for the links to the forums. I recently found a Chaos League patch for SoD 3.2 - I'll take a look. And maybe someone else can provide a link to download the erm tools, instructions for them, and where they are located in Wog? What files are they, and how do you open them...? I understand that I'm asking too many questions.
As for RMG, the problem is that I edited it, but our version of SoD (I think it's the one that was patched with the Chaos League patch - we just downloaded it from each other - we don't know where it came from)), if you just put it in the Data folder, it doesn't recognize it. I repack it into a lod - the same effect - it continues to generate standard templates, as if nothing happened. But if I put the same RMG into other Heroes games - Armageddon's Blade or Complete - it works perfectly - it's a mystery.