I found the problem. And I have a suggestion. The problem is that the readme.txt says "If you want to make egomassive's mod your primary version of Knytt Stories, then open your Knytt Stories folder and rename "Knytt Stories.exe" to "Knytt Stories 121.exe"." This causes the preview to not run. Secondly, for my suggestion, I didn't have the readme.txt at first because when you open the ks+091.zip, the readme.txt and ks+ instructions.txt are not in the Knytt Stories directory which means they would be sitting in the Program Files directory if I simply copy the ks+ files over into the fresh install of Knytt Stories. Yes, you have a KS+091 directory before that, but to install KS+ you have to start with a fresh installation of Knytt Stories, which means when I installed it, I just opened up the ks+ zip to Knytt Stories and copied what was in that into the fresh Knytt Stories directory and the .txt files got left behind. So, in other words, I think there is some awkwardness happening here, though it could be just me. I think you would be better off eliminating the Knytt Stories directory from the zip so that the .txt files are in with the rest (which is where I think most of us would want to keep them anyway) and either leave it up to the installer what to call the Knytt Stories + directory, or else include renaming the fresh Knytt Stories directory to something else in the directions. And if we rename Kytt Stories Plus.exe to Knytt Stories.exe, is there a way to tell the editor to use that exe? Can you include that in the readme.txt too?