Sorry, version 5 May had a little bug - the stack was 2 DWORDs off when printing QWORDs with Str$(). This affects the Haskell example (http://masm32.com/board/index.php?topic=10045.msg109906#msg109906).
MasmBasic version 8 May fixed this issue - please reinstall (http://masm32.com/board/index.php?topic=94.0).