This is the latest version of L2Dat EncDec, 2.1.38 for Gracia Final and previous versions.
How-to:
1. Specify the path of your system folder.
2. Select a file and click Load.
3. Click Export -> Save the file.
4. Open the decrypted file (*.tsv) with a text editor (Notepad++ <3) and edit it.
5. Back to L2Dat EncDec, Click Import -> Select the file you just edited, and click Save!
Thanks goes to the developer of this awesome tool, TSLRoom.
Download:
http://rapidshare.com/files/271324904/L2Dat_EncDec-EN-2.1.38.rar
If you have any question feel free to ask,
HF, Spawn.