cant save as pdf!

I cant find simple step-by-step instructions for using pdf24; im tired, i cant sit and work it out for myself...!

Can someone point me in the direction of some simple step-by-step instructions for using this? I have scanned some images and I want to save them as pdfs. I seem to be able to do that quite easily in the window that opens up when I click on the shortcut, but when I save it only gives me the usual options, jpeg, tiff, gif etc. And when I open it again, it doesnt open as a pdf. Nor am I getting the assistant which is supposed to open after Ive printed something/created the pdf using this software.

What I would like to do is to create printable pdfs from scanned images and email them to my friends to share.

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