yes I noticed we had an issue on our update server, it would not download the latest version. I fixed the issue on our server, but it can take a couple of hours because of caching. To speed up the process try:
1) disable our plugin
2) enable it again
3) go to Dashboard > Updates and try updating to 3.0.7 again
About the expiry date being removed… I can’t imagine this being related to the update issue, our plugin doesn’t even manipulate those fields. If you don’t update, do these fields also get removed occasionally?