Attempted to Covert PDF to Word Document and all pdf files on computer are in wrong format

 I wanted to convert a pdf  file to a word document, so I started to fill out the form to  purchase Adobe Acrobat Pro DC, but I changed my mind and did not complete the subscription.  As a result, all the  Adobe Acrobat files I have on my computer were automatically converted to  the  strange format  shown below with  all the options on the side and on the top, cluttering the pdf.  How  do I  restore  the document to a clean pdf. Thanks for your input.  I  use Windows 10, and I unistalled the Adobe Reader App, and downloaded Adobe Reader and the files were still corrupted.