Registering MaXC will let you use matrices bigger than 6x6 and it will also disable the registration reminder screen that displays randomly in Free Trial edition.
You will need to run the Register method just once in your project, preferably in the initializing routines. You can call the Register method from within the main() procedure of your code, or you can call it from within the Form_Load() event of a form.
Dim A as Matrix
Sub Main()
Set A = New Matrix
A.Register "Registration Name", "Registration key"
' Check if unlock was successful using Version Property
' It will return version number plus
' "Standard Edition" or "Advanced Edition"
Debug.Print A.Version
'continue with the rest of your code here
End Sub
Registration Name is the one that you used when purchasing ShortName . Registration Key is the key that was sent to you by email after you purchased the component.
See more details about Register method here.