https://bugs.winehq.org/show_bug.cgi?id=45375
--- Comment #39 from Paul Gofman gofmanp@gmail.com --- I am sorry, supporting PlayOnLinux and Wine installation is out offtopic here.
Just when you get it right, you should see something like "000b:fixme:winediag:start_process Wine Staging 4.18 is a testing version containing experimental patches." at the beginning of the log. And if you set up multiply_special key correctly, you should also see a message in the log as in comment #37.
BTW your log suggests CSMT is not disabled either, though I am not sure you need that. There is also message about that in log, and it works in both mainstream and staging versions).
May I suggest you to make Staging and the registry setting work (and verify that in your log), and report the test results / logs after that?