We had the same problem and did the suggestion above of renaming the relevant HKEY file and then re-installed OpenLP. I thought it was all working ok but then this evening I had a training session with a new user (the first time I've used OpenLP since the error was fixed) and discovered that the Preview panels are all blank.Also when OpenLP starts the logo appears on a white screen instead of the usual just-logo over whatever was on screen before. I have re-installed OpenLP (again!) and this has not resolved the problem. Obviously we can use the software on Sunday but it is not ideal without the Preview.<br>What's more, I've just found exactly the same on my Mac at home<img src="https://forums.openlp.org/uploads/editor/65/875s7873q0mg.png" alt="">, as per screen shot. The Church computer is Windows running Windows 7.<br><br>We save all files to Dropbox, and so both Windows and Mac computers are accessing the same set of data. It's worked great for 18 months so I don't know why it is not now. Also can't understand how the data files affect the Preview option.<br><br>Any ideas gratefully accepted.