This week Miva Merchant rolled out version 5.5 of their renowned shopping cart application. It's a free upgrade for Miva Merchant users already running version 5.0, and it's offered as a streaming update. The bad news is that it's quite easy to upgrade. The good news is that it's quite easy to upgrade. Here's what I mean: When you log into your store's administrative interface, depending on your notification settings, you may see a popup window that looks like this: