Moneylender 3 User's Guide
Perhaps the best way to get familiar with Moneylender 3 is to watch the Intro to Moneylender 3 Video. This video will walk you through creating a portfolio, setting up a couple loans, recording payments, printing statements and running reports.
Some helpful topics you might wish to check out include:
Throughout Moneylender 3, you'll see buttons. Click the button to open the page of the documentation that matches the part of the program you're using.