I imagine about the time that Sophos pushes out an automatic firmware update from 9.1xx to 9.2xx (probably when they release 9.202, still some bugs to squash in 9.201). Probably not much longer. If you want to run it in AWS now, you can just deploy the 9.105 AMI and update it to 9.201 by updating the 9.105 AMI (via up2date) to 9.111, then manually (via Webadmin) upload the manual 9.111 to 9.201 update file found at http://download.astaro.com/UTM/v9/up2date/u2d-sys-9.111007-201023.tgz.gpg
