I created a new, blank .cap file and right-clicked on the Animator bar to import a tileset. I selected the "Import Frame" option on the menu. The import window opened up, I browsed my files, selected a .png file to import, and then I selected the "cut into tiles" option. As soon as I did this the program crashed. I also tried this four times last night with different .png files and it did the same thing each time. The version of Construct I'm using is 0.98.8.
.cap file
Also, not sure if this information is helpful, but the first time I tried to import an image and cut it up it worked. I hadn't added any kind of layout at that point. Every time after that, though (even after shutting down the program, turning off the computer, starting up the program again, etc., whether I have a layout there or not), it gets as far as cutting the image into separate tiles in the pop-up box, but whenever I hit the "Import" button the program crashes. It does this exact thing every time.