1- susie plugins not working..
2- png save not working..
|How did you install the plugins?
When you say the PNG save doesn't work, would it refuse to save the file, or did the saved file not load in another program. If it's the later then send me the original graphic and the broken PNG and I'll see what I can do.
If you didn't get that far then try typing the full extension in the program... 'file.png' always works for me.