Here is what I do.
Select the folder containing the recipes
Click File Export All
Save as Beersmith 1.x File (*.bsm)
Navigate to where you want the export file saved
Give it a file name (e.g. jomebrew_04_12-2021.bsm)
Save
Open BS2
Click File
Click Open File
Navigate to the previously saved bsm file
This will open a all recipes in a new tab
Move these files to your desired folder to save them in BS2 permanently