Replace Windows explorer query

Hi,
I installed DO but choose not to replace windows explorer. Since then I've purchased a license and would like to let DO replace Windows Explorer. How do I go about this ? IF I reinstall do I have to enter licensing information again or can I do this from the menu (couldn't see an option for this)?

Thanks.

No need to reinstall:

Settings
Preferences
Launching Opus>>Explorer Replacement (you can get there more quickly if you type in Explorer in the "Find" window.)

Then adjust what you want.

thanks.