I am a bit confused. The link I posted above points to the English FAQs, not the German FAQs.
There's a section called What do I do when switching to a new device/smartphone?
And the Pro version FAQs can be found here. Where exactly are you stuck? I recommend using the Cloud Sync on all your devices. But you can also create a backup file, put it on a USB, transfer it to your new PC and import it there