having this issue too tonight, ive tried everything here but they just aren't working.
but then, i try to open my old project and ..... it can be opened without errors.
i close my old project , and my CW is error again. so i open my old project again and create new empty project and save it.
now everytime i want to open new project i use that empty project file. so i think the error is maybe on the cakewalk's frontpage (is that how you call it?) and not in my device.
i attach my empty project file here.
hope this helps
empty.zip