I tried to import the design I downloaded and again, nothing happened!
Do you get an error message when trying to import the design? If so, it will tell you the reason (or at least one of the reasons) it failed; keep in mind you will need to have the corresponding technologies unlocked in order for this to work.
(I'm also not 100% sure if this design will work with the last release of the mod as it was created in an earlier version.)
I tried to import the desing I downloaded using the info you give me and again, nothing happened! I put the design in the fold "Layout" in "Script Data" exactly like you told me.
Does the design even show up in the list of importable designs?
Just checked it, the design does indeed work in the latest release. However, you need some pretty high tech levels to unlock the required subsystems; the advanced AI core, for instance, requires Computers 11
Just to make sure, the location where you need to copy the file to should be:
C:\Users\<your username>\Documents\My Games\Star Ruler\Mods\GalacticArmory\Profiles\Script Data\Layouts