Hi J Snoek,
As per the issue description, you want to know how to convert a PDF into Excel and Excel into PDF, Is that correct ?
The records shows that you have an active subscription of Adobe PDF Pack, Annual under your Adobe ID.
Adobe PDF Pack is a bundle of Adobe Document Cloud services. With it, you can easily create, combine, sign, and send PDF files online. You can also convert PDF files into editable Word or Excel files.
You can use Adobe Reader DC to use the services.
To downoad the Reader: PDF reader, PDF viewer | Adobe Acrobat Reader DC
You may also refer to the link to check How you can convert files into PDF: https://helpx.adobe.com/document-cloud/help/using-pdfpack.html
Keep us posted with the results.