Not saving "Replace all smaller files" as default

Hi,

I want to move files and allow Teracopy to replace all smaller files by default. Whenever I select "Replace the smaller files" in the Transfer options and "save as default", it doesn't stick.

So next time I move files, Teracopy requests another selection what to do with existing files.

I wonder if this a limitation from the free version, or am I missing something?

Thanks for your support!