If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
NEW : You can now close your own issues and reopen them later if needed. You can also comment closed issues.
List of issues#66 Decompress LZMA from commandline
Author:
JPEXS
JPEXSDate created:
Type: feature
Visibility: Everybody
Assigned to:
Labels: Commandline
State: closed 

From guestbook by Swede:
Decompress LZMA from commandline
State: new→opened
version 1.5.0 was released.
-decompress option now decompresses LZMA compressed files too.
State: opened→closed