Follow "Preparation for Migration" in the Migrating guide to prepare your MainBoss Basic database for migration.
In particular, make sure you clean up your MainBoss Basic database in accordance with the
Recommended Clean-Up Procedures.
On the computer where SQL Server is running,
login to an account with Windows Administrator and SQL Server Administrator privileges.
Save the installation file and execute it to install MainBoss.
Follow "The Migration Process" in the Migration Guide to export data from MainBoss Basic and create
a MainBoss database in SQL Server.
Start MainBoss and look at the results.
If the migration seems to have gone correctly, you can proceed to install MainBoss on
any other computer where users may wish to run it.
Remember that .NET 4.6.1 must be installed on every computer where you wish to use MainBoss.