I have installed Logos 4 in my computer using Windows Vista for about a month. It has run perfectly until I installed Nelson's ePreacher in my computer. After I sychronised the license, many functions of Logos 4 disappeared. Then I unstalled both software and then installed them again. This time Windows said it detected a problem in Logos 4 and Logos 4 simply did not continue. Now I could not open Logos 4 at all. Could anyone tell me what happen and what I can do to fix it?