You are putting it in the wrong folder. You only need to go the base game directory to get the tools.

All user created content goes in the "My Documents" -> "My Games" -> "Ironclad Games" -> "Sins of a Solar Empire Rebellion" folder. In that folder, there is a folder called GalaxyForge, which is where you can put your map and the game will add it to the Galaxy Forge tab in game.

So I saved my file in the folder you specified and still nada, no clue why tho i even tried to install the maps in the regular galaxy folder, is it because its on steam?

No, this is what you use if you have Rebellion, which requires steam.

Might you have Trinity on steam? This only works for Rebellion. Regardless, if you go in game, to the main menu and to the mods tab, there is a "Show Mod Path" button. The last folder will say mods... but if you change it to GalaxyForge that is where you must put maps. This will work no matter how you game is installed.

Goafan you have saved my evening, many thanks.

Would it be too much trouble to put a little readme in the Galaxy forge folder?  Been saving it in the automatic folder for hours trying to figure out what's wrong...