That screen shot is the free software Acrobat Reader, I think. You should check. If it is, you need Acrobat Pro instead - not enough to subscribe, Reader doesn't change. You end up with both apps and have to choose.
I am sorry for the delay in response.
As mentioned above, you need to install Acrobat Pro DC on your computer.
Could you please try installing Acrobat DC on your computer from the following link?
Please feel free to update this discussion in case you need further assistance.