This following guide will show you how to load a saved world.
Step 1:
Log into your game panel and click 'stop' on your service.
Step 2:
Select Configuration files, and select SpaceEngineers-Dedicated.cfg Graphical editor
Select Configuration files, and select SpaceEngineers-Dedicated.cfg Graphical editor
Step 3:
Go to worldname and make sure the worldname is the same as the worldname in the saves folder
Step 4:
Check Show "Advanced Settings?:" and make sure the "World Save Folder:" has the same name as the worldname and hit save
Step 5:
Go to the SpaceEngineers-Dedicated.cfg Text Editor and look for the string called
<IgnoreLastSession>true</IgnoreLastSession>
and set it to false
<IgnoreLastSession>false</IgnoreLastSession>
Step 6:
Save the file and start the server