If you see an inactive icon, go ahead and tap on it. The system will attempt to activate and launch it. If there is a problem you will get an error message. If you do not know what frozen packages are, you probably will soon. There are a variety of third party developers providing utilities that turn on this latent feature of the Extras Drawer.
Frozen packages are inactive packages.
The difference is that they are purposely made inactive by the user and stay inactive until the user taps on them. Suppressing package activation as described above only deactivates packages temporarily. Activating packages uses up some of the system's working memory and takes time. Cards with a large number of packages can take a long time to mount and can cause you to run low on memory. You freeze a package or group of packages by selecting them in the Extras Drawer and choosing freeze from the action button.