Hello Maya,
You have an active subscription of Adobe PDFPack on your email id and it's an online service and cannot be downloaded as an application. But you can access the services through a browser and can be accessed through the free desktop version of Adobe Reader DC.
If you have installed the Adobe Reader, then sign in with your Adobe ID and password to use the services of Adobe PDFPack. You can also use the services through the URL https://cloud.acrobat.com/convertpdf with your Adobe ID and password.
If you have not installed the Reader, then download and install it through Adobe - Adobe Acrobat Reader DC Distribution and use the services of Adobe PDFPack.
Note: If you have installed Acrobat Pro or Standard and trying to use the services of Adobe PDFPack, you will get a message to purchase as you are not subscribed to any subscription of Acrobat. So uninstall Acrobat Pro or Standard from the machine.
If you have installed the Creative Cloud Desktop app, and trying to use the services of Adobe PDFPack, you will get the error message to purchase/subscribe. You have to uninstall the Creative Cloud Desktop app, use the Cleaner tool to uninstall Creative Cloud Desktop app Use the Creative Cloud Cleaner Tool to solve installation problems
Hope this helps and clarifies, let us know if you have any confusion or you face any issue.
Regards,
Anand Sri.