Although this is a minor release, it contains some big features:

• Persistence. Sia is now fully persistent; no more redownloading the blockchain when you reload. Your blockchain, wallet, and peer info will be automatically loaded from disk on startup.
• File sharing: You can now share files stored on Sia with your friends! File retrieval metadata can be saved to a .sia file or encoded as a (very long) ASCII string for even easier sharing.
• Limited NAT traversal: Previously, everyone on the network had to forward their ports. This is no longer necessary; a connection only requires one peer to have forwarded ports. This comes with two caveats though: you still won't be able to connect to a peer if you're both behind NAT, and you still must forward your ports if you want to be a host.
• As always, we have continued to improve test coverage and general stability.

Note that v0.3.1 is not compatible with v0.3.0. Our bootstrap node has been updated to v0.3.1, so you will have to update as well in order to connect it. You can update by downloading the binaries below.

Full release notes can be found in the README included in the release.
Thanks again for being a beta-tester!