I deleted the winfile cache file.
I cannot reinstall - or uninstall - or disable - extensionmanager just hangs and I get error messages on opening DW3 about cannot open the webassist WA_configuration.js for both CSSMenuwrite and the same message about ProMaps
I also tried renaming the .mxi files for these extensions but that didn't help.
PS - making progress and I don't know how - I was finally able to REMOVE the older version of Menuwriter- now I'm working on ProMaps