LDPartEditor total noob jurney

[Philippe Hurbain]

Glad to see you back here

Thanks for replay.
I discover that... using MLCAD to disassembled content of .DAT and create new part is easy this days. Just select object and press DEL.
It is another tool with GUI, that i use to accomplish this task ?

I used MLCad for years to create LDraw parts, but I am now super happy to have LDPE which is so much more powerful - and actually it's relatively easy to use past the (very) steep learning curve. I had a hard time initially, but it was well worth the trouble.
For some very simple parts, you could also try Bricklink's Studio companion, Part Designer. Hugely underpowered for complex parts, but very easy to use for simple parts.