install4j: Using environment variable for file chooser default -

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i adding file chooser on form , want default initial directory environment variable. if specify ${my_env_varb}, don't see being populated (install4j version 5.1.5)

environment variables not supported in text field expressions, have add "set variable" action "variable name" of "myvar" , script of

system.getenv("my_var")

and use syntax

${installer:myvar}

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