Yup, the archive is version 1.0.3, but the SVN does have 1.0.4 code. The zip file being out of date might have something to do with the filename not including the version number, keeping the old version cached.
The following files are changed, and available from the SVN:
modified: CHANGELOG.txt
modified: clear-autoptimize-cache-automatically.php
modified: includes/support.php
modified: languages/clear-autoptimize-cache-automatically.pot
modified: readme.txt
https://plugins.svn.ww.wp.xz.cn/clear-autoptimize-cache-automatically/trunk/
