[...] I thought it might be because I’d personalised my Windows colour scheme; perhaps they’d put the results in white text on a white background and that was why nothing showed up. But there’s no way to change the colours in the program; you can’t even highlight the text with the mouse so it appears in negative, and nor can you copy it. Then I thought no more about it and hit uninstall. That didn’t work very well either, because it left remains of the program on my computer, which I then had to delete manually. The famous Uruguayan software industry … what absolute crap. Modestly, I should add that my own programs, though simpler and less ambitious, are much better designed and made, whichever way you look at them. I configured the Windows screen so it returned to how it used to be, and luckily it worked. Everything was back to normal.