Can i convert all my mp3(s) to wma?

That's easy. Just click then "find" function in window's explorer to find out all you mp3 files Then "Select all" or click ctrl-A, right click on you selection. All mp3 files will add to the job box.

Right clicking fails to display "Convert mp3(s) to wav, wma, vqf

Mp3 To All Converter needs to be re-associated with mp3 files. You can do this by running the "Mp3 To All Convert" in the Mp3 To All Converter program group. Click the Window's start button and select Programs, then find the "Mp3 To All Converter" folder and click the "Mp3 To All Converter".

Are the mp3 files replaced by the Mp3 To All Converter?

No. The mp3 files that you convert are not deleted until you select "Overwrite existing files". They are kept intact. The converted files are stored in the destination directory, which defaults to "C:\My Music"

Right clicking in Napster is failing to show "Convert mp3(s) to wav, wma, vqf"

Make sure you are right clicking in Windows. I have had quite a few people try to right click within Napster. This is not possible, because Napster is written by a different software company. Napster defaults to storing its mp3 files in the folder C:\Program Files\Napster\Music\ . Right click on one of the mp3 files in that folder.

OK, what am I doing wrong? How do I use this?

To start converting mp3 files, you need to right click on the mp3 files in Windows. Yes, you heard right. You start the program by right clicking on mp3 files in Windows.
For example, if you had a bunch of mp3 files in "C:\Music", you would first double click "My Computer", followed by double clicking "(C:)", followed by double clicking the "My Music" folder. Select the mp3 files you want to convert. You can select the mp3 files by either dragging, or if you hold down the Ctrl key you can individually select them. Right click on one of the selected mp3 files and a menu will appear. Click "Convert mp3(s) to wav,wma,vqf" and the program will start!