I have just purchased the Adobe PDF pack and converted the files into PDF form no problem. I want to combine these files into a single PDF document but for some reason in the tools menu, it just says 'ADD' under combine, rather than 'OPEN'. How can i get around this?
As per the description above, you want to combine PDF files, but you are getting "Add" under Combine Files tab instead of "Open", Is that correct?
The "Add" button under the Combine Files is to add PDF files which you want to combine and it's a designed behavior of Adobe Reader DC(Assuming you are using Adobe Reader DC to combine PDF files).
You can also combine PDF files on a browser through the URL https://cloud.acrobat.com/combinepdf and you will get "Select Files to combine". This is also a designed behavior and there is no such option to change it.