Good at Publisher documents, but it can’t save as .pub again

If you are looking for a wonderful Microsoft Office Publisher viewer and editor app on your Mac, this is the best I have used. App can do everything well about what It promised, I can edit and insert text, image, change fill color, text color, text font and so on, it is very easy ! Unfortunately, app can not save as .pub file again after I finish the document editing. I have mailed to developer, the customer service is good, they have a plan about this feature !

mario schamb about PUB Editor Pro - for Microsoft Publisher Editor