The "Modules in a Box" mod (included with Base In A Box and MadTulip's Ship Mod) includes the ability to export building blueprints to your starbound.log file, with instructions for installing in your /assets/user/ folder to make them permanent additions to your game. I've written a small app to help automate the process of extracting custom building blueprints from the log and saving them in /assets/user/ which is available to download here. No installation is necessary, though the exe will produce a single .ini file in the same folder as it's run from. HOW TO USE Here's a brief guide to the UI: On first run, you'll need to locate your Starbound folder (by clicking the penguin) and choose which log file to examine (most likely you'll want "starbound.log" but you can choose older logs too) once you have the right folder and a log file that contains blueprints, click "Scan Log File" to extract the blueprints and then "Save All" to export them all to your /assets/user/ folder. Advanced users can also inspect each object to see which files are being exported and optionally rename the object but none of that is necessary - although the default object names are generic, in-game you'll see whatever name & description you entered when scanning. If anyone has any suggestions or feature requests, feel free to let me know.