Just copied the latest (0.9.26Pre-Rel33b) build of the portable version and extracted it. Created a new IQBase with sample data.  In section 1.1.2.2 of the Welcome grid, I noticed that there are some references to missing images.  As I started navigating through the topics, I found more than a few instances as shown below....Note that there is a "good" image reference in between the missing ones....