I downloaded a free version of Adobe Acrobat a couple of months ago and ever since then, email attachments etc open up in Acrobat even though I do not want it to. How do I disable Acrobat from being the default option for opening up attachments?
Windows? What app do you want to open the files?
Go to Settings/apps/default apps, click on Adobe, click on PDF extension and then select the app you want.