Our tech support staff maintains a blog which answers your questions and provides technical information about our products: http://drggrouperstechblog.blogspot.com/
Our ICD10 catalog /technical reference
The current list of versions we support and which version was released when is here.
Information about how we shifted to ICD10-based DRGs is here.
You can view sample VBA code for calling our DLL here.
Various CMS test data sets reformatted by us:
Our ICD9 (pre-v33) catalog / technical reference is here.