Decompression of LHA and LZH files [REGISTERED VERSION ONLY] As of version 1.10r (the registered version of 1.10), LZX can decompress ".lha" and ".lzh" archives. In fact, due to its faster decompression algorithm and asynchronous disk i/o, LZX decompresses ".lha" and ".lzh" files 25-35% faster than LhA. As always, the speed improvement is dependent on the CPU and hard drive speed; your mileage will vary.