Thanks for the info.
The problem in my case is that I don't get any errors at all. It just absolute does nothing no matter what. DW itself functions normally but none of the PowerCMS Builder menus work. It's as if menus are dummy text and nothing exists. And this is after two reinstall attempts and performing all the usual tricks such as deleting .dat file and so on.
It would be helpful if it actually tries to do something, you know....