Can you define what you mean nothing on them?
If you mean that you cannot open pdf file, then you are correct, you cannot open single pdf file because it is encrypted. Only thing you can do is to start program tdata (under Windows operating system) and find information you need. Zip files you downloaded do not work other ways.
On the other hand if youmare,using Windows 10 build number 2004 or later you might have problems with running Adobe Acrobat from tdata.exe file. In that case you can try following:
1) Copy the CD contents into a folder on your harddrive or USB stick.
2) Locate and open the 'Acrobat4' folder.
3) Open the 'Resource' folder.
4) Delete the folders 'CMap' and 'Font' or rename them
Rave will now open and run, you may get a warning of missing fonts but it doesn't seem to cause any other issues.