When adding vendors, if you click the drop down list and select "New" to create a new vendor, the program crashes. This is the worst thing I have encountered so far, because you have to find and delete all the .ptl and .lck files (the app thinks another user is trying to access the company; remember this is the single user version). This happens sometimes under windows too. **Work Around - Create all your new vendors using the Maintain->Vendors menu option to open the dialog.
On the help menu use only the option: Show Me How To... Not only do the regular help files (.chm) not work, they sometimes hang the app. The "Show Me How To..." help consists of Flash movies and works fine.