[michelutti]

Hey! I have always one doubt about this type of product (pay once). How do you distribute your source font, as well the installer to your customer? Do you use another software for a restricted area to download? Or is the download open to anyone, but you have to offer a license key to run the app?

[23andwalnut]

The app is distributed as a single zip, but the installer requires a license key. Updates are distributed through the duetapp website, which also requires a license key before the update is delivered.

[michelutti]

Nice! But is it secure? As the customer already have the source code, what stops him to change the license code? I mean, if the source code is available, I can install it by myself without using the installer.

[johnward]

I know a lot of PHP projects that do this use IONcube loader and mcrypt. So you get the source but it's encrypted.