Ugh, that was a lot of work.

Anyway, here it is, in all its glory.
1. Compatible with EQEmu 0.4.3. It will NOT work with earlier versions.
2. Added some checking to all of the "Delete Record" buttons so that they won't try to delete from an empty dataset.
3. Adding records will insert a valid ID value for most if not all tables.
4. Made a change to prevent a crash when the item database is empty.
Two things:
I had to test with an empty DB. I could really, really use a DB that's compatible with 0.4.3.
I noticed that there were some NPC spells that showed up as "unknown" in the tool, which means that it doesn't have those entries in its SPELLS.TXT. If some kind soul could get those entries to me for the next version I'd be grateful.
Have at it, gang...
Wind