Yes, I see that launch agent in the LaunchAgents folder, and I have pasted its contents below. The
Backup by Time.scpt file that it references is dated Feb 22, 2014, which would be about the last time I remember having reliable operation.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.shirtpocket.backupbytime</string>
<key>LimitLoadToSessionType</key>
<string>Aqua</string>
<key>ProgramArguments</key>
<array>
<string>osascript</string>
<string>/Users/michael/Library/Application Support/SuperDuper!/Scheduled Copies/Backup by Time.scpt</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>StartInterval</key>
<integer>60</integer>
</dict>
</plist>