My friend Dawn is having this exact same problem. Shes reinstalled several times and I even tried comparing our folder properties side by side. Her folder has 1,967 files while mine has 2,033(screenshots and log files excluded). This suggests the updater is leaving out alot of files. Which files exactly I haven't figured out.
As for the "/data/db/C_item.ini " that doesn't exist in my folder either yet I can connect just fine.