A hotfix (a TAR of files to upload) has been uploaded to this issue. Only apply this hotfix if you absolutely need it and cannot wait until the next release of Composr (releases are more reliable and strictly tested).

You can manually extract and replace these files (do not replace if your on-disk file is newer than the one in the hotfix). Always take backups of your site or at least files you are replacing before applying a hotfix. Not sure how to extract TAR files to your Windows computer? Try 7-zip (http://www.7-zip.org/).

This hotfix will NOT work via the upgrader; you must apply manually. Furthermore, you must apply this hotfix before you can apply any other hotfix if you have Composr version 11.alpha3 - 11.beta1.