Database Folder (Tools=>Options=>General)
Set this folder to where you would like all the GSAK databases stored. Click on the find button to navigate and select a folder.
Warning: Synchronizing this folder with Dropbox or similar cloud service will cause problems. Because of the internal links and logic within GSAK to keep everything in sync this will lead to obscure errors, and very likely, permanent database corruption. You cannot make changes in the GSAK databases without instigating them through GSAK itself.