The Tor Browser team expects to get a release out early next week. This is an alpha release: if you aren’t up for finding and reporting bugs, you should stick with a stable release series. This release also marks the end of support for the Tor 0.2.4.x, 0.6.x and 0.3.7.x release series. Anyone still running or distributing one of those versions should upgrade. The source is available from the “download” page on the Tor website on the website.”]
Source: https://lists.torproject.org/pipermail/tor-talk/2017-August/043395.html