Aut2Exe seems to have vanished, so here's a clean copy left of the latest version from there website including another tool for those who ever need it again.

Exe2Aut.exe

Size 50.18 KB
Version v0.10.0.0 (2014-01-09)
Virus Analysis VirusTotal
Checksums
CRC 501aa527
MD5 d6369ffbfde64a9aafcc2021e12f0e1a
SHA1 d3535f623b628f8a0ad843cd561d5e136d5ab5f2

myAutToExe2_00_Alpha_src.7z contains files which are detected (samples). I am unsure if those are clean, obviously just delete this or use it in a safe place to test. The source is included.

https://www.sendspace.com/file/pmkgyc  1.37MB   4 downloads