Simple scan won't "remember" settings

Hi guys, love your program but have one question to ask. When I use the program I change default text resolution to 300dpi and upon exit it goes back to the default. This occurs for EVERY setting I change. (I did notice a tiny click button in the top left corner of the preferences window but that does not appear to do anything)

It also occurs when changing the default scan type from photo to text, upon exit it defaults back to photo everytime.

The scanner is a Canon LiDE 210

Cheers

Rod