Khriez - it appears to be a bug in the database extraction tool if you only have TQ installed and not the expansion. The extraction tool was only recently modified to work with the expansion and this is the first time since then someone has tried to use it without the expansion. Bug can be fixed - don't worry.
So 2 things you can do:
1. Go download TQVault 2.11 for a working database extractor. You can find it on Soulseekkor's website. Look in the TQ Defiler thread for his website. You can still use the current TQVault for all your inventory needs. It works just fine with or without the expansion. It is just the database extractor that has a problem in the current version.
2. Or get the expansion
It really adds alot to the game.