If you use torrent, this is the magnet link (this is the old official one, I'm still hosting this):
magnet:?dn=PlaneShift-v0.5.8-x64.exe&xt=urn:sha1:7HME2FRLEBCKHSA5GYD3IQHLLMRMTAYQ
magnet:?dn=PlaneShift-v0.5.8.exe&xt=urn:sha1:AGEJMCNS76AOMA4MSNV566NZT2XGATXS
I don't know if you use ed2k (emule or similar), but if you do you can get 0.5.8 from here (if anyone hosts it):
ed2k://|file|PlaneShift-v0.5.8-x64.exe|784730918|42A3C43E4F69463ED9FC639D407C5B39|/
hostsed2k://|file|PlaneShift-v0.5.8.exe|782166182|6EED0A174356CB8AC9148D60031EAEF0|/
hosts