Right-click
Select one or more files, right-click, TadaFile, and choose. The menu only shows what makes sense for those files: no «JPG to JPG», no «merge» with a single PDF.
With several files selected it's a single job: the results go into one folder, so they don't get mixed up.
On Windows 11 TadaFile is under «Show more options», or you get there straight away with Shift + right-click.

