They are either in the items folder by accident or they are in the obj folder and you cant identify them in the parameter editor.
What you need to do is...
Remember the .mdo name that came with the download, open objedit.
Type something in the object name field. Something you will remember like KijiruX water.
Where it says model file name, click change. That object you remembered will be on the list that appears. Find it, then if its water the object type you set up should be normal, the size cylinder or cube (for water it doesnt matter.) finally height width and length all at zero.
The program objedit is attached incase you need it. You should have it if you downloaded the som tools.
What you need to do is...
Remember the .mdo name that came with the download, open objedit.
Type something in the object name field. Something you will remember like KijiruX water.
Where it says model file name, click change. That object you remembered will be on the list that appears. Find it, then if its water the object type you set up should be normal, the size cylinder or cube (for water it doesnt matter.) finally height width and length all at zero.
The program objedit is attached incase you need it. You should have it if you downloaded the som tools.