When you download Moneydance you'll initially be running the trial version.

When viewing the Summary page, you'll see a blue bar at the top of the screen that displays -
"Demo mode: You may manually enter X more transactions as part of your free trial"

Once you've purchased Moneydance you'll receive a license key via email from our payment processing partners, Paddle. You need to enter your license key to "unlock" the trial limitations.

You can select Help --> Register Moneydance to enter the license key.

To check if the program is registered, you can navigate to Help --> About Moneydance (Moneydance menu on a Mac). In the window that opens you'll either see 'Unregistered' or your license key will be displayed.