Adobe Acrobat X Pro stopped working as a full version and suddenly became a trial version and the serial number would not work to activate

I finally got a hold of what sounded like an Southeastern Indian support person on the phone.  I was told the product was no longer compatable and that is why it expired.  I tried to explain that my operating system was the same since I had purchased the product and that nothing had changed except that it suddenly became a trial version and that the key ID would not work.  She continued to tell me that there was nothing they could do to get it working again, but she could offer me a discounted monthly subscription service.  I am Sorry, but this is a fraudulent and deceptive business practice,  It apepars to me that from my product registration the company realized that I was using a one time puchase product, that they found a way to deactivate it and force me into a subscription service which would cost me more in one year than I paid for the software to begin with.  While this might seem like a great business model to those at Adobe Corporate Headquarters, it is deceptive and dishonest.  It is one thing for a piece of software to no longer work in an operating environemnt, but nothing has changed on my end!  I would NEVER go back to an Adobe product based on this experience with their business practice.

​@Dhlavac 

The only thing I can think of of is that you accidentally clicked on a tool that is now part of the "Adobe Document Cloud" (like Send for Signature or certain Export PDF cloud features), the software may have tried to log you into a modern Adobe ID, which overrode your old serial-number-based offline license. I don't have Acrobat X Pro on my computer, but there should be a License Repair Tool, maybe try that, https://www.adobe.com/support/contact/licensing.html

Since you have already re-install, and used the Adobe Cleaner, you may need to run it as an administrator versus as a user too