Gets the job done, but shoudn't and isn't intended for non-programmer end user.
I'm not mad at small programs or developers with not much time to setup a distribution pipeline, they should be praised for their work at the program itself. But different OSes have different places to unpack a program and this allows simple updates, we should respect that for consistency at user end. Expect it's Windows, which is a unspecified mess anyway, let's go and unpack everything raw on C:\ or into user directory.