I followed the steps above. However, when I start DW, I was getting an error (see attached image 001.tiff). After reinstalling the eCart extension, I activated it and now get this error (see 002.tiff). I've deleted the cache file. Problem still persists. When I click 'OK" on dialog box in 002.tiff, I'm left with the blank window behind (003.tiff) and am forced to do a force quit just to get out of DW. Very frustrating. Please help!