Upgrading GForce is straighforward. First you need to backup the entire system. Next, copy the public/uploads and public/saas_uploads folder to a separate location. Also copy the .env file (in the root directory) to a safe location. Then replace the application's files with the new files you downloaded. Once you have done this, place back your .env file back to the root directory. Also copy your public/uploads and public/saas_uploads directory back.
Finally, open your terminal and run the following commmands:
php artisan migrate
php artisan tenancy:migrate