As described in the forums rules:
"If there's no specific forum for the data files you need to ask about, please contact the author directly - you can find their contact information under the Help menu ("Contact Data File Author") within Army Builder and Card Vault. Please don't post questions about data files in the Army Builder and Card Vault forums."
The problem with having an 'other data files' forum is that it would be misleading - what if the data file author never read the forum? Then you'd have a lot of people posting for no good reason.