Please see the page "Settings in the file wincmd.ini (Part 1)" => Section [Configuration].
See also:
https://www.ghisler.ch/board/viewtopic.php?t=24762
karlchen wrote:The T.C. helpfile does not explain what the parameter firstmnu is used for.
ghisler(Author) wrote:firstmnu is mainly used to check whether the ini is writable, so you can set it to a fixed value.
BTW: Why does TC use the firstmnu key if there is another key "Test="?
TC Help File wrote:Test=______This key is used internally to check whether the ini file is writable. If not, an error message will be shown.