Output filename same as input filename

Several people are having the same issue, for the same simple task I am working on.
I am trying to convert .png files into .pdf files, and I want to keep the same filename: abc.png => abc.pdf
The token is not working.
For the Default Profile, I have:
In Document Title:
In Save, Filename Template:

When I right click on the file and convert, I am getting “Full page print.pdf” name.

Could you please help?

Thanks!