It didn't work because sparkle uses its own version comparator to detect downgrade attacks.

This reverts commit 512c5b4a.

Change the version number to 3.1.x. This affects only nightly builds, which will be named 3.1.x-nightly. When I build a beta release, the release_beta script will tack on .beta, so it must be run as release_beta.sh 3.1.0. That will produce 3.0.1.beta. This commit adds a Sparkle version comparator that special-cases versions ending in .beta so that a non-beta with the same first two parts will compare as newer (e.g., 3.1 is newer than 3.1.9.beta).