Hell Per Fruck,
Welcome to our forums and thanks for your enquiry.
If your CAD application is sending those documents as separate print jobs - the default settings in our driver will mean that you will get asked for each of those prints separately to select where it has to be saved.
I presume you want to "merge" them all into one file - then please try making settings similar to these:
And now all yuor print jobs will be merged together silently without you being asked for a file name at all.
You will of course need to move/rename the binder file between separate print batches, to make sure that you get the correct pages collected together each time.