I Can See My Blueprints But StarMade Cannot

The blueprint format the catalog manager can import are .sment files.
They are usually in the "exported" folder, unless you specify a different location on export.

So from the view in your file-browser the blueprints should be in the exported subdirectory.

The import dialog from your screenshot can read .sment and .zip files.

You may need to scroll to the end of the filelist to see them.



It also helps if you set the filetype to .sment files.

However, I assume you talk about the "folders" being in the /blueprints/ directory but not listed in the catalog manager?
This is because it acts on the last played worlds catalog.

When creating a new world, the game asks you if it shall copy the catalog from an existing world, from there a snapshot of the current state will be created.
So if you have 3 worlds, and add some blueprints in world1, some others in world2 and then play world3 for a while, the catalog manager will only see the blueprints in world3.
To get a catalog with ALL blueprints, create a new world, and click 'cancel' on the dialog asking to a source world to import the catalog from.
As a side effect, all blueprints will have the owner "unknown" and will only be available by the admin tab.
But after playing this world once and exiting, you should have all blueprints in your catalog manager.

If not, please examine if the blueprint directories were malformed in some way.
Especially a renamed .sment file causes a lot of issues, because they have an internal snapshot of the directory structure and renaming it, will have the import create the wrong base directory, leading to failed imports, or duplicate imports, that create empty folders.

- Andy