Important Note: CabWriter 4 includes new defaults as explained in the release notes, which means it may or may not work properly when opening a CabWriter 3.x model. The safest course is to finish up any CabWriter 3.x model using CabWriter 3 and start any new models with version 4.
If you must open a version 3 model with version 4, the best practice is to use the Re-Load Factory Settings (RFS) tool after opening it with the new version, then saving the file. Any cabinets drawn after that will include the new settings. If you use the Retrieve Cabinet Defaults tool and draw a new cabinet, it will also include the new defaults. If you don’t use the RFS tool, you may experience intermittent behavior when drawing cabinets.