There was a minor bug in 0.31 where it doesn't correctly redirect for the schema update. We have taken down the problematic version and we have released a new build. The new version has an MD5 checksum of: af49c16cb5d9a3af3a47fbda37d5db51
You can get the checksum on your downloaded file by running:
md5sum [fogdownloadfile].tar.gz
If you downloaded and installed the version with the bug, don't panic, you can either reinstall the new build or navigate to the schema updater manually via:
http://x.x.x.x/fog/commons/schemaupdater/
Thanks for your understanding :)