LhA KeyFile: 
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To install copy 'LhA.Key' file to L: Dir and use rego'd copies of lha
and be able to unarc lha150r.run and the file inside it lha150r.lha.
Or to use LhA.key2 rename to LhA.Key and copy to L:. Or to make your
on keyfile use MakeLhAKey.