as springfiles.com also runs the index service, automaticly downloads don't fully work atm: automatic engine and map downloads fail, automatic games download should still work as rapid (the service which is used to download games) runs on this server.
still manual download of maps/games is possible via one of the mirrors:
http://spring1.admin-box.com/
the spring engine can be downloaded from this server:
https://springrts.com/dl/buildbot/default/master/100.0/
for more details / updates on the problem see this forum thread:
viewtopic.php?f=1&t=33782
the plan is, to get it running again in ~24 hours.