[plumser]

dunno if this helps any, but i've written a simple python script to update my library. I use this on ubuntu but maybe you can adapt it for windows..

Code:

#!/usr/bin/python
import json
import httplib, urllib

url = 'http://your.xbmc.ip:port'
jsonrpcurl = url + '/jsonrpc'

updatestr = json.dumps({'jsonrpc': "2.0", 'method': "VideoLibrary.ScanForContent", 'id': "1"})

urllib.urlopen(jsonrpcurl, updatestr).close()