Windcatcher a couple of suggestions.
 

For the next release of your editor, could you update the item editor to handle the newer items and focus items?

I tried to change the txt files to get it to work, but it crashes the program.

For the itemstruct. Offset 144 should be:

0144 char idfile[8]; // 3d model file in globalx.s3d

Just doing that works fine, and updating the other fields to compensate. The problem is putting an item with more than 3 digits into the itemvisuals.txt file. Putting in something like 1000 for the luclin sword causes an error.

I also wanted to mention that offsets 358 and 359 are where the focus effect is stored. Its in uint 8 form. So having a focus effect of improved healing IV which is spell ID 3501, you'd have ad0d in offsets 358 and 359.

Thanks. :)