I have tried it,
My start.wdl is in a folder 'Workfolder1' with all the elements from WED.
All my script files in the folder 'Scripts'.
Indeed I can't run my game, and when I loaded the start.wdl in SED all the included files will not automaticaly loading in SED and yes I have set Load Included Files in SED --> Configuration on the tab Environment.
When I open WED it say's;
Can't open file 'x.wdl'
Can't open file 'y.wdl'
Can't open file 'z.wdl'
etc
Now I have placed all the wdl files in the workfolder, then it works.
So you can only place the wdl files in a subfolder in the workfolder, and that is not what I want because then the wdl files are not visible for my other workfolder.

Regards,
Frits