(Milestone should be 3.5.0, but this version is missing from the dropdown choices. I selected 3.5.2, because it came closest. This is a defect in Sourceforge.)
File, Global preferences, Update, Test connection yields "Unable to download release.xml from the specified location"
Log
2015-11-05 10:33:48,997 [AWT-EventQueue-1] ERROR net.sourceforge.squirrel_sql.client.Application - Unable to download release.xml from the specified location
java.io.FileNotFoundException: Failed to download file from url (http://sourceforge.net/projects/squirrel-sql/files/updates/stable/release.xml): HTTP Response Code=404
Settings, not changed in years
Site type: Remote
Server: sourceforge.net
Port: 80
Path: /projects/squirrel-sql/files/updates
Channel: stable
Url: http://sourceforge.net:80//projects/squirrel-sql/files/updates/stable/release.xml