Use copy / paste to quickly fill in your license code during installation.
Tip: When you receive your license key, it will have three groups of letters and numbers, for example:
XXXXXX-AAAAAAAA-4444444
If you highlight the complete code and CTRL-C to copy it, the installer program will then automatically fill in all three sections of the keycode for you when you get to the relevant step. This helps reduce mis-typed codes.