There few files that have the revision comment like shown on destroyersimpost comment. Maybe plugin author can clean up all the files and release another update.
If anyone have problem like this, all you need to do is, download to version 3.1.9, then deactivate the plugins, and activate again once you uploaded the files from 3.1.9.
Then the problem with no related post will be solved and we can wait till the new version really stable.