Let's say that you have installed the demo version of one of our plugins and you now want to upgrade to the full version. After you buy

Step 1: Buy and download the full version

Step 2: Deactivate the demo version from your blog

Step 3: Delete the demo version from your blog

Step 4: Install the full version on your blog

All your existing settings will be "remembered" by the full version. So, whatever you did with the demo version will not be wasted :-)