How to transfer or recover blueprints from another account

First, we need to locate the blueprints. At the time I am writing this, on Windows they will be located in %appdata%\Axolot Games\Scrap Mechanic\User. Then, you will get a list of users. In each user there will be a folder called 'Blueprints' which is where the blueprints are stored.

Next, copy all the contents of the Blueprints folder and then you need to find your current user. Use the same method stated in the previous section. Go to that user's Blueprints folder and paste the files. If it prompts you to replace a file, decline. Relaunch the game, join a creative world, and press E on the lift and your old blueprints should appear!