I often try to do the following in XnView and always am negatively surprised:
1. Save As
2. Choose "image.png" as target name
3. Press save
What happens:
if the last file type used was JPG, then image.png will be saved as image.jpg
What should happen:
If the file name ends on a known extension (in order to also work with names like "image-2016.05.01" ), then use the associated file type of that extension.
Save Dialog: Select type by extension
Moderators: XnTriq, helmut, xnview