Got the file, thanks. Ohh, and there should't be a problem at all with having the UBB version of MHK installed.
I checked it and I couldn't find a problem. I created the exact same directory structure as your database file has. I made no changes to it in fact and ran the app. Everything worked as it should. No crashes or anything. With your paths as an example, make sure that it looks something like the following:
C:\- yourhostsucks.com\Multi_Hack\input
and that your \forums folder and everything below it (including the \forums folder itself) are placed within the input folder above. Also, make sure you are using the latest version. If you are using the 1.0.1 version that would explain all of these problems as it had a problem installing.
With the hack that was installed in the DB you sent me, I couldn't get that hack to work. Even with an external editor I couldn't find the "Old Data" reference you were making.
Let me know. =)