Hello there,
I regret and feel bad to say updated Inventor 2013 SDK files are not good.
I have downloaded latest Inventor 2013 SDK files from Autodesk Network Dev website as suggested by Brain Ekins in Mod the Machine Blog.
Can some body from Autodeks ADN, please update these SDK files and post them Again on ADN website...
Templates from Registry free addins in this link are working fine I think.
If I am wrong Please Correct me.