I have OSX 10.4.3 and when I click the icon for LW Pro The Pro box pops up like it's going to open and then it disappears and so does the icon in the dock. Regular LW works. Do I need to delete regular before I download and install Pro? I just purchased Pro today and if it's not going to work I will request a refund. WWWazzup? Oh, if it matters, I have an Imac with 2 ghz processor.